# Backup failure: Detected files associated with non-existing blocksets **URL:** \ **Category:** Support\ **Created:** [August 1, 2019, 9:53am UTC](https://forum.duplicati.com/t/backup-failure-detected-files-associated-with-non-existing-blocksets/7663 "2019-08-01T09:53:33Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![anon8404338](https://forum.duplicati.com/letter_avatar_proxy/v4/letter/a/a4c791/32.png) [@anon8404338](https://forum.duplicati.com/u/anon8404338)\ **Post date:** [August 1, 2019, 9:53am UTC](https://forum.duplicati.com/t/backup-failure-detected-files-associated-with-non-existing-blocksets/7663/1 "2019-08-01T09:53:33Z")
I have a daily backup running that has started throw this error: `Detected files associated with non-existing blocksets!` I am running 2.0.4.5 (2.0.4.5\_beta\_2018-11-28) on macOS High Sierra Full error: ``` Failed: Detected files associated with non-existing blocksets! Details: System.Exception: Detected files associated with non-existing blocksets! at Duplicati.Library.Main.Database.LocalDatabase.VerifyConsistency (System.Int64 blocksize, System.Int64 hashsize, System.Boolean verifyfilelists, System.Data.IDbTransaction transaction) [0x001b7] in :0 at Duplicati.Library.Main.Operation.Backup.BackupDatabase+<>c __DisplayClass32_0.b__ 0 () [0x00000] in :0 at Duplicati.Library.Main.Operation.Common.SingleRunner+<>c __DisplayClass3_0.b__ 0 () [0x00000] in :0 at Duplicati.Library.Main.Operation.Common.SingleRunner.DoRunOnMain[T] (System.Func`1[TResult] method) [0x000b0] in :0 at Duplicati.Library.Main.Operation.BackupHandler.RunAsync (System.String[] sources, Duplicati.Library.Utility.IFilter filter) [0x01031] in :0 at CoCoL.ChannelExtensions.WaitForTaskOrThrow (System.Threading.Tasks.Task task) [0x00050] in <6973ce2780de4b28aaa2c5ffc59993b1>:0 at Duplicati.Library.Main.Operation.BackupHandler.Run (System.String[] sources, Duplicati.Library.Utility.IFilter filter) [0x00008] in :0 at Duplicati.Library.Main.Controller+<>c __DisplayClass13_0.b__ 0 (Duplicati.Library.Main.BackupResults result) [0x00035] in :0 at Duplicati.Library.Main.Controller.RunAction[T] (T result, System.String[]& paths, Duplicati.Library.Utility.IFilter& filter, System.Action`1[T] method) [0x0011d] in :0 Log data: 2019-08-01 11:47:26 +02 - [Error-Duplicati.Library.Main.Operation.BackupHandler-FatalError]: Fatal error System.Exception: Detected files associated with non-existing blocksets! at Duplicati.Library.Main.Database.LocalDatabase.VerifyConsistency (System.Int64 blocksize, System.Int64 hashsize, System.Boolean verifyfilelists, System.Data.IDbTransaction transaction) [0x001b7] in :0 at Duplicati.Library.Main.Operation.Backup.BackupDatabase+<>c __DisplayClass32_0.b__ 0 () [0x00000] in :0 at Duplicati.Library.Main.Operation.Common.SingleRunner+<>c __DisplayClass3_0.b__ 0 () [0x00000] in :0 at Duplicati.Library.Main.Operation.Common.SingleRunner.DoRunOnMain[T] (System.Func`1[TResult] method) [0x000b0] in :0 at Duplicati.Library.Main.Operation.BackupHandler.RunAsync (System.String[] sources, Duplicati.Library.Utility.IFilter filter) [0x003d6] in :0 ``` Before I start groping about, what does this problem mean and what can/should I do about it? ---
**Author:** ![anon8404338](https://forum.duplicati.com/letter_avatar_proxy/v4/letter/a/a4c791/32.png) [@anon8404338](https://forum.duplicati.com/u/anon8404338)\ **Post date:** [August 4, 2019, 4:26pm UTC](https://forum.duplicati.com/t/backup-failure-detected-files-associated-with-non-existing-blocksets/7663/2 "2019-08-04T16:26:18Z")
Nobody? I really need to find out and the manual is silent about it.I had a look in the code to find the string and it seems to have to do with a corruption in the local database. And given that it isn’t supposed to happen, might this be a duplicati bug? ---
**Author:** ![ts678](https://forum.duplicati.com/letter_avatar_proxy/v4/letter/t/8491ac/32.png) [@ts678](https://forum.duplicati.com/u/ts678)\ **Post date:** [August 7, 2019, 12:40pm UTC](https://forum.duplicati.com/t/backup-failure-detected-files-associated-with-non-existing-blocksets/7663/3 "2019-08-07T12:40:18Z")
> [@anon8404338](#): > > And given that it isn’t supposed to happen, might this be a duplicati bug? Seems reasonable by definition, but it’s also a rarely seen bug, and these are often extremely hard to find. Only report in forum or [issues](https://github.com/duplicati/duplicati/issues) appears to be this, and your [Backup failure: Detected files associated with non-existing blocksets #3850](https://github.com/duplicati/duplicati/issues/3850). Have you found others? In the source of VerifyConsistency, [this self-check](https://github.com/duplicati/duplicati/blob/4e1f94bd3479ec10ef812f005266c70d3c6da37b/Duplicati/Library/Main/Database/LocalDatabase.cs#L810-L813) appears just below another that’s seen more often, but still has never been reproducible reliably by either users or developers. I can point to some debug methods. Long and latest is below, but there were others: [Fatal error: Detected non-empty blocksets with no associated blocks](https://forum.duplicati.com/t/fatal-error-detected-non-empty-blocksets-with-no-associated-blocks/5938/43) Can you inspect and post the default backup log from the last seemingly successful backup or operation? Because the database is verified before further use, the verification sometimes finds errors added earlier. Ideally preparing for analysis of a problem would have copies of the database before and after corruption, along with hugely detailed logfile, but that’s too heavy to be done routinely unless one is chasing an issue. You could consider posting a link to a [database bug report](https://duplicati.readthedocs.io/en/latest/03-using-the-graphical-user-interface/#creating-a-bug-report) which is pretty well sanitized for path names in 2.0.4.5 or 2.0.4.23 beta (basically the same), but less so in some other canary and experimental releases. Possibly that would offer some slight clues on how things got how they are, but there’s often no substitute for being able to reproduce the problem on a developer’s system where they can examine it as they wish. This is really what a GitHub issue would prefer in “Steps to reproduce” – how to reproduce it from scratch. ---
**Author:** ![anon8404338](https://forum.duplicati.com/letter_avatar_proxy/v4/letter/a/a4c791/32.png) [@anon8404338](https://forum.duplicati.com/u/anon8404338)\ **Post date:** [August 7, 2019, 2:01pm UTC](https://forum.duplicati.com/t/backup-failure-detected-files-associated-with-non-existing-blocksets/7663/4 "2019-08-07T14:01:08Z")
> Can you inspect and post the default backup log from the last seemingly successful backup or operation? Sure, I’m happy to help (in fact, unless this is solved and the performance problems I’m having, I’m afraid to move fully to Duplicati and will have to keep CrashPlan around). But what exactly do you mean by “default backup log from the last seemingly successful backup”? Exactly what file am I looking for? I’ll try to create a database bug report. ---
**Author:** ![anon8404338](https://forum.duplicati.com/letter_avatar_proxy/v4/letter/a/a4c791/32.png) [@anon8404338](https://forum.duplicati.com/u/anon8404338)\ **Post date:** [August 7, 2019, 3:43pm UTC](https://forum.duplicati.com/t/backup-failure-detected-files-associated-with-non-existing-blocksets/7663/5 "2019-08-07T15:43:27Z")
How long is a debug run supposed to run? A normal run for that backup is around 9 minutes. Currently, mono-sgen has been running at 100% of a core for almost 60 minutes while the UI says “Creating bug report”. ---
**Author:** ![drwtsn32](https://forum.duplicati.com/user_avatar/forum.duplicati.com/drwtsn32/32/2591_2.png) [@drwtsn32](https://forum.duplicati.com/u/drwtsn32)\ **Post date:** [August 7, 2019, 3:55pm UTC](https://forum.duplicati.com/t/backup-failure-detected-files-associated-with-non-existing-blocksets/7663/6 "2019-08-07T15:55:26Z")
It takes longer because it is sanitizing file path information and then it also vacuums the database. ---
**Author:** ![ts678](https://forum.duplicati.com/letter_avatar_proxy/v4/letter/t/8491ac/32.png) [@ts678](https://forum.duplicati.com/u/ts678)\ **Post date:** [August 7, 2019, 7:01pm UTC](https://forum.duplicati.com/t/backup-failure-detected-files-associated-with-non-existing-blocksets/7663/7 "2019-08-07T19:01:50Z")
> [@anon8404338](#): > > But what exactly do you mean by “default backup log from the last seemingly successful backup”? Exactly what file am I looking for? A backup (and most other operations) leave a log in the Reporting → Show log menu of backup GUI. One can also have such logs emailed, and I think you sometimes get a more detailed set of lines on any errors. Emailed reports (like other things that might help) must be set in advance. I’m now looking for what exists. What I’m looking for is at least one log before the problem was noticed, because that may be where it may have been seeded. So for example, a Tuesday backup log might provide clues about an error Wednesday. These would most easily be had by copy-and-paste from the browser. Putting three tildes before and after will help keep the line-oriented format more legible (not all run together in a word-wrap style like other text). Unless you can figure out what happened and how to reproduce it (ideal), collecting afterwards is the plan. ---
**Author:** ![anon8404338](https://forum.duplicati.com/letter_avatar_proxy/v4/letter/a/a4c791/32.png) [@anon8404338](https://forum.duplicati.com/u/anon8404338)\ **Post date:** [August 7, 2019, 9:04pm UTC](https://forum.duplicati.com/t/backup-failure-detected-files-associated-with-non-existing-blocksets/7663/8 "2019-08-07T21:04:41Z")
I let the database debug run but while it was running my Mac paniced. Reason yet unknown, I will have to investigate. The log of the last successful backup is: ``` DeletedFiles: 15 DeletedFolders: 0 ModifiedFiles: 121 ExaminedFiles: 216437 OpenedFiles: 140 AddedFiles: 19 SizeOfModifiedFiles: 204677483 SizeOfAddedFiles: 1519808 SizeOfExaminedFiles: 17666966535 SizeOfOpenedFiles: 206247307 NotProcessedFiles: 0 AddedFolders: 0 TooLargeFiles: 0 FilesWithError: 0 ModifiedFolders: 0 ModifiedSymlinks: 0 AddedSymlinks: 0 DeletedSymlinks: 0 PartialBackup: False Dryrun: False MainOperation: Backup CompactResults: DeletedFileCount: 0 DownloadedFileCount: 0 UploadedFileCount: 0 DeletedFileSize: 0 DownloadedFileSize: 0 UploadedFileSize: 0 Dryrun: False MainOperation: Compact ParsedResult: Success Version: 2.0.4.5 (2.0.4.5_beta_2018-11-28) EndTime: 7/31/2019 10:36:31 AM (1564562191) BeginTime: 7/31/2019 10:36:18 AM (1564562178) Duration: 00:00:12.5053110 Messages: [ 2019-07-31 10:27:00 +02 - [Information-Duplicati.Library.Main.Controller-StartingOperation]: The operation Backup has started, 2019-07-31 10:28:11 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: List - Started: (), 2019-07-31 10:28:17 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: List - Completed: (404 bytes), 2019-07-31 10:35:16 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: Put - Started: duplicati-b78cf3cfe23d44e0a8cb77125bcd75cf9.dblock.zip.aes (2.08 MB), 2019-07-31 10:35:30 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: Put - Completed: duplicati-b78cf3cfe23d44e0a8cb77125bcd75cf9.dblock.zip.aes (2.08 MB), ... ] Warnings: [] Errors: [] BackendStatistics: RemoteCalls: 9 BytesUploaded: 20813671 BytesDownloaded: 20715703 FilesUploaded: 3 FilesDownloaded: 3 FilesDeleted: 1 FoldersCreated: 0 RetryAttempts: 0 UnknownFileSize: 0 UnknownFileCount: 0 KnownFileCount: 406 KnownFileSize: 9363578046 LastBackupDate: 7/31/2019 10:27:00 AM (1564561620) BackupListCount: 12 TotalQuotaSpace: 0 FreeQuotaSpace: 0 AssignedQuotaSpace: -1 ReportedQuotaError: False ReportedQuotaWarning: False ParsedResult: Success Version: 2.0.4.5 (2.0.4.5_beta_2018-11-28) Messages: [ 2019-07-31 10:27:00 +02 - [Information-Duplicati.Library.Main.Controller-StartingOperation]: The operation Backup has started, 2019-07-31 10:28:11 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: List - Started: (), 2019-07-31 10:28:17 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: List - Completed: (404 bytes), 2019-07-31 10:35:16 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: Put - Started: duplicati-b78cf3cfe23d44e0a8cb77125bcd75cf9.dblock.zip.aes (2.08 MB), 2019-07-31 10:35:30 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: Put - Completed: duplicati-b78cf3cfe23d44e0a8cb77125bcd75cf9.dblock.zip.aes (2.08 MB), ... ] Warnings: [] Errors: [] DeleteResults: DeletedSets: [ Item1: 1 Item2: 7/31/2019 9:27:00 AM (1564558020) ] Dryrun: False MainOperation: Delete ParsedResult: Success Version: 2.0.4.5 (2.0.4.5_beta_2018-11-28) EndTime: 7/31/2019 10:36:31 AM (1564562191) BeginTime: 7/31/2019 10:36:04 AM (1564562164) Duration: 00:00:26.4805850 Messages: [ 2019-07-31 10:27:00 +02 - [Information-Duplicati.Library.Main.Controller-StartingOperation]: The operation Backup has started, 2019-07-31 10:28:11 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: List - Started: (), 2019-07-31 10:28:17 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: List - Completed: (404 bytes), 2019-07-31 10:35:16 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: Put - Started: duplicati-b78cf3cfe23d44e0a8cb77125bcd75cf9.dblock.zip.aes (2.08 MB), 2019-07-31 10:35:30 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: Put - Completed: duplicati-b78cf3cfe23d44e0a8cb77125bcd75cf9.dblock.zip.aes (2.08 MB), ... ] Warnings: [] Errors: [] RepairResults: null TestResults: MainOperation: Test Verifications: [ Key: duplicati-20190731T082700Z.dlist.zip.aes Value: [], Key: duplicati-ice3730ea6dd24330b63cef37884615f2.dindex.zip.aes Value: [], Key: duplicati-ba6ed4da4f1f444e89bfde716007d36bd.dblock.zip.aes Value: [] ] ParsedResult: Success Version: 2.0.4.5 (2.0.4.5_beta_2018-11-28) EndTime: 7/31/2019 10:36:52 AM (1564562212) BeginTime: 7/31/2019 10:36:38 AM (1564562198) Duration: 00:00:14.3614110 Messages: [ 2019-07-31 10:27:00 +02 - [Information-Duplicati.Library.Main.Controller-StartingOperation]: The operation Backup has started, 2019-07-31 10:28:11 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: List - Started: (), 2019-07-31 10:28:17 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: List - Completed: (404 bytes), 2019-07-31 10:35:16 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: Put - Started: duplicati-b78cf3cfe23d44e0a8cb77125bcd75cf9.dblock.zip.aes (2.08 MB), 2019-07-31 10:35:30 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: Put - Completed: duplicati-b78cf3cfe23d44e0a8cb77125bcd75cf9.dblock.zip.aes (2.08 MB), ... ] Warnings: [] Errors: [] ParsedResult: Success Version: 2.0.4.5 (2.0.4.5_beta_2018-11-28) EndTime: 7/31/2019 10:36:52 AM (1564562212) BeginTime: 7/31/2019 10:27:00 AM (1564561620) Duration: 00:09:52.3065040 Messages: [ 2019-07-31 10:27:00 +02 - [Information-Duplicati.Library.Main.Controller-StartingOperation]: The operation Backup has started, 2019-07-31 10:28:11 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: List - Started: (), 2019-07-31 10:28:17 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: List - Completed: (404 bytes), 2019-07-31 10:35:16 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: Put - Started: duplicati-b78cf3cfe23d44e0a8cb77125bcd75cf9.dblock.zip.aes (2.08 MB), 2019-07-31 10:35:30 +02 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: Put - Completed: duplicati-b78cf3cfe23d44e0a8cb77125bcd75cf9.dblock.zip.aes (2.08 MB), ... ] Warnings: [] Errors: [] ``` This backup runs every hour. ---
**Author:** ![ts678](https://forum.duplicati.com/letter_avatar_proxy/v4/letter/t/8491ac/32.png) [@ts678](https://forum.duplicati.com/u/ts678)\ **Post date:** [August 8, 2019, 12:35am UTC](https://forum.duplicati.com/t/backup-failure-detected-files-associated-with-non-existing-blocksets/7663/9 "2019-08-08T00:35:07Z")
That log looks fine at first glance. Didn’t see special things like errors or warnings or retries or a compact. ---
**Author:** ![anon8404338](https://forum.duplicati.com/letter_avatar_proxy/v4/letter/a/a4c791/32.png) [@anon8404338](https://forum.duplicati.com/u/anon8404338)\ **Post date:** [November 24, 2019, 9:39am UTC](https://forum.duplicati.com/t/backup-failure-detected-files-associated-with-non-existing-blocksets/7663/10 "2019-11-24T09:39:40Z")
I am returning to this backup issue (there are now so many of my test backup machines in trouble that I am starting to worry about duplicati). What should I do in case of `Detected files associated with non-existing blocksets!`? I have upgraded to 2.0.4.34\_canary and tried a repair database, which returned quickly and solved nothing. This corruption may even be a bigger issue than my other one. Log data: ``` System.Exception: Detected files associated with non-existing blocksets! at Duplicati.Library.Main.Database.LocalDatabase.VerifyConsistency (System.Int64 blocksize, System.Int64 hashsize, System.Boolean verifyfilelists, System.Data.IDbTransaction transaction) [0x001b6] in <759bd83d98134a149cdf84e129a07d38>:0 at Duplicati.Library.Main.Operation.Backup.BackupDatabase+<>c __DisplayClass34_0.b__ 0 () [0x00000] in <759bd83d98134a149cdf84e129a07d38>:0 at Duplicati.Library.Main.Operation.Common.SingleRunner+<>c __DisplayClass3_0.b__ 0 () [0x00000] in <759bd83d98134a149cdf84e129a07d38>:0 at Duplicati.Library.Main.Operation.Common.SingleRunner.DoRunOnMain[T] (System.Func`1[TResult] method) [0x000b0] in <759bd83d98134a149cdf84e129a07d38>:0 at Duplicati.Library.Main.Operation.BackupHandler.RunAsync (System.String[] sources, Duplicati.Library.Utility.IFilter filter, System.Threading.CancellationToken token) [0x01033] in <759bd83d98134a149cdf84e129a07d38>:0 at CoCoL.ChannelExtensions.WaitForTaskOrThrow (System.Threading.Tasks.Task task) [0x00050] in <9a758ff4db6c48d6b3d4d0e5c2adf6d1>:0 at Duplicati.Library.Main.Operation.BackupHandler.Run (System.String[] sources, Duplicati.Library.Utility.IFilter filter, System.Threading.CancellationToken token) [0x00009] in <759bd83d98134a149cdf84e129a07d38>:0 at Duplicati.Library.Main.Controller+<>c __DisplayClass14_0.b__ 0 (Duplicati.Library.Main.BackupResults result) [0x0004b] in <759bd83d98134a149cdf84e129a07d38>:0 at Duplicati.Library.Main.Controller.RunAction[T] (T result, System.String[]& paths, Duplicati.Library.Utility.IFilter& filter, System.Action`1[T] method) [0x0026f] in <759bd83d98134a149cdf84e129a07d38>:0 at Duplicati.Library.Main.Controller.Backup (System.String[] inputsources, Duplicati.Library.Utility.IFilter filter) [0x00074] in <759bd83d98134a149cdf84e129a07d38>:0 at Duplicati.Server.Runner.Run (Duplicati.Server.Runner+IRunnerData data, System.Boolean fromQueue) [0x00349] in <63a01150aadd4a64a4d7c359bdc1e45d>:0 ``` ---
**Author:** ![ts678](https://forum.duplicati.com/letter_avatar_proxy/v4/letter/t/8491ac/32.png) [@ts678](https://forum.duplicati.com/u/ts678)\ **Post date:** [November 24, 2019, 2:57pm UTC](https://forum.duplicati.com/t/backup-failure-detected-files-associated-with-non-existing-blocksets/7663/11 "2019-11-24T14:57:40Z")
[CheckingErrorsForIssue1400 and FoundIssue1400Error test case, analysis, and proposal #3868](https://github.com/duplicati/duplicati/issues/3868) describes an issue where a backup of a file that is growing at the time can pick up a momentary file ending, record it as a short file block, then get confused when the file later has more data to record. [v2.0.4.24-2.0.4.24\_canary\_2019-09-02](https://github.com/duplicati/duplicati/releases/tag/v2.0.4.24-2.0.4.24_canary_2019-09-02) > Fixed sporadic issue with backups of files being written, thanks [@BlueBlock](https://github.com/BlueBlock) If Repair isn’t able to fix this, then it’s possibly going to need some extensive manual database work, because the error message doesn’t give specifics. If bad file is identifiable, possibly it can be [purged](https://duplicati.readthedocs.io/en/latest/04-using-duplicati-from-the-command-line/#the-purge-command). [DB Browser for SQLite](https://sqlitebrowser.org/) can open the [database](https://duplicati.readthedocs.io/en/latest/03-using-the-graphical-user-interface/#database-management), then the starter SQL is given in this [profling](https://duplicati.readthedocs.io/en/latest/06-advanced-options/#log-file-log-level) level [log](https://duplicati.readthedocs.io/en/latest/06-advanced-options/#log-file): ```plaintext 2019-11-24 08:30:50 -05 - [Profiling-Timer.Begin-Duplicati.Library.Main.Database.ExtensionMethods-ExecuteReader]: Starting - ExecuteReader: SELECT "CalcLen", "Length", "A"."BlocksetID", "File"."Path" FROM ( SELECT "A"."ID" AS "BlocksetID", IFNULL("B"."CalcLen", 0) AS "CalcLen", "A"."Length" FROM "Blockset" A LEFT OUTER JOIN ( SELECT "BlocksetEntry"."BlocksetID", SUM("Block"."Size") AS "CalcLen" FROM "BlocksetEntry" LEFT OUTER JOIN "Block" ON "Block"."ID" = "BlocksetEntry"."BlockID" GROUP BY "BlocksetEntry"."BlocksetID" ) B ON "A"."ID" = "B"."BlocksetID" ) A, "File" WHERE "A"."BlocksetID" = "File"."BlocksetID" AND "A"."CalcLen" != "A"."Length" ``` [VerifyConsistency](https://github.com/duplicati/duplicati/blob/79d839546b238be79967bf8532267bfab2b08aa6/Duplicati/Library/Main/Database/LocalDatabase.cs#L734) looks like it uses above to find a problem list, then looks into them more, including: > EDIT: Corrected to point slightly lower to correct message, where it’s unclear it’s fixed, but it might be. where that `COUNT(*)` waters things down to just a count. Running it by hand as `*` might get us further. This is all untested territory for me though, so it could take some doing and might still come up empty. Less precise options include assuming new problem is in the latest version (–version=0), so delete it. There’s a chance Recreate might fix things, depending on whether the issue has gotten into backend. Ultimate solution is to start new backup, and probably stay on 2.0.4.34 Canary, and avoid Stop button. Change [Settings](https://duplicati.readthedocs.io/en/latest/03-using-the-graphical-user-interface/#settings-in-duplicati) back to Beta if you like, or just stay on Canary and help test a bleeding-edge release. ---
**Author:** ![anon8404338](https://forum.duplicati.com/letter_avatar_proxy/v4/letter/a/a4c791/32.png) [@anon8404338](https://forum.duplicati.com/u/anon8404338)\ **Post date:** [November 24, 2019, 3:57pm UTC](https://forum.duplicati.com/t/backup-failure-detected-files-associated-with-non-existing-blocksets/7663/12 "2019-11-24T15:57:52Z")
I was able to get this repaired (I think delete and recreate). Surprisingly, I’ve got all my test backups running again after 4-5 months not having enough time to spend on it and with a move to canary.