Backup Error - Warning-Duplicati.Library.Compression.FileArchiveZip-BrokenCentralHeaderFallback

Hi,

I have this error on one of our backups, and a repair is not fixing it.

Any ideas ?

|object(stdClass)#201 (3) { ["Data"]=> object(stdClass)#204 (12) { ["ClassName"]=> string(29) "System.NullReferenceException" ["Message"]=> string(53) "Object reference not set to an instance of an object." ["Data"]=> NULL ["InnerException"]=> NULL ["HelpURL"]=> NULL ["StackTraceString"]=> string(1396) " at SharpCompress.Readers.AbstractReader2.get_Entry() at SharpCompress.Readers.AbstractReader2.LoadStreamForReading(Stream stream) at Duplicati.Library.Compression.FileArchiveZip.LoadEntryTable() at Duplicati.Library.Compression.FileArchiveZip.OpenRead(String file) at Duplicati.Library.Main.Volumes.VolumeReaderBase.ReadManifests(Options options) at Duplicati.Library.Main.Volumes.VolumeReaderBase..ctor(String compressor, String file, Options options) at Duplicati.Library.Main.Operation.CompactHandler.DoCompact(LocalDeleteDatabase db, Boolean hasVerifiedBackend, IDbTransaction& transaction, BackendManager sharedBackend) at Duplicati.Library.Main.Operation.DeleteHandler.DoRun(LocalDeleteDatabase db, IDbTransaction& transaction, Boolean hasVerifiedBacked, Boolean forceCompact, BackendManager sharedManager) at Duplicati.Library.Main.Operation.BackupHandler.CompactIfRequired(BackendManager backend, Int64 lastVolumeSize) at Duplicati.Library.Main.Operation.BackupHandler.d **19.MoveNext() --- End of stack trace from previous location where exception was thrown --- at CoCoL.ChannelExtensions.WaitForTaskOrThrow(Task task) at Duplicati.Library.Main.Controller.<>c** DisplayClass13_0.b **0(BackupResults result) at Duplicati.Library.Main.Controller.RunAction[T](T result, String[]& paths, IFilter& filter, Action1 method)" [“RemoteStackTraceString”]=> NULL [“RemoteStackIndex”]=> int(0) [“ExceptionMethod”]=> string(151) "8 get_Entry SharpCompress, Version=0.18.2.0, Culture=neutral, PublicKeyToken=afb0a02973931d96 SharpCompress.Readers.AbstractReader2 TEntry get_Entry()" ["HResult"]=> int(-2147467261) ["Source"]=> string(13) "SharpCompress" ["WatsonBuckets"]=> NULL } ["Extra"]=> object(stdClass)#199 (2) { ["OperationName"]=> string(6) "Backup" ["backup-name"]=> string(8) "database" } ["LogLines"]=> array(2) { [0]=> string(558) "2019-01-14 23:28:31 +00 - [Warning-Duplicati.Library.Compression.FileArchiveZip-BrokenCentralHeaderFallback]: Zip archive appears to have a broken Central Record Header, switching to stream mode System.InvalidOperationException: Cannot determine compressed stream type. Supported Archive Formats: Zip, GZip, Tar, Rar, 7Zip, LZip at SharpCompress.Archives.ArchiveFactory.Open(Stream stream, ReaderOptions readerOptions) at Duplicati.Library.Compression.FileArchiveZip.get_Archive() at Duplicati.Library.Compression.FileArchiveZip.LoadEntryTable()" [1]=> string(1236) "2019-01-14 23:28:51 +00 - [Error-Duplicati.Library.Main.Operation.BackupHandler-FatalError]: Fatal error System.NullReferenceException: Object reference not set to an instance of an object. at SharpCompress.Readers.AbstractReader2.get_Entry() at SharpCompress.Readers.AbstractReader2.LoadStreamForReading(Stream stream) at Duplicati.Library.Compression.FileArchiveZip.LoadEntryTable() at Duplicati.Library.Compression.FileArchiveZip.OpenRead(String file) at Duplicati.Library.Main.Volumes.VolumeReaderBase.ReadManifests(Options options) at Duplicati.Library.Main.Volumes.VolumeReaderBase..ctor(String compressor, String file, Options options) at Duplicati.Library.Main.Operation.CompactHandler.DoCompact(LocalDeleteDatabase db, Boolean hasVerifiedBackend, IDbTransaction& transaction, BackendManager sharedBackend) at Duplicati.Library.Main.Operation.DeleteHandler.DoRun(LocalDeleteDatabase db, IDbTransaction& transaction, Boolean hasVerifiedBacked, Boolean forceCompact, BackendManager sharedManager) at Duplicati.Library.Main.Operation.BackupHandler.CompactIfRequired(BackendManager backend, Int64 lastVolumeSize) at Duplicati.Library.Main.Operation.BackupHandler.d** 19.MoveNext()" } }