Compacting because there are 21 small volumes and the maximum is 20

Support
6

I found only this error in common log

SharpCompress.Compressors.LZMA.DataErrorException: Data Error
   at SharpCompress.Compressors.LZMA.LzmaStream.Read(Byte[] buffer, Int32 offset, Int32 count)
   at Duplicati.Library.Utility.Utility.ForceStreamRead(Stream stream, Byte[] buf, Int32 count)
   at Duplicati.Library.Main.Volumes.BlockVolumeReader.ReadBlock(String hash, Byte[] blockbuffer)
   at Duplicati.Library.Main.Operation.CompactHandler.DoCompact(LocalDeleteDatabase db, Boolean hasVerifiedBackend, IDbTransaction& transaction)
   at Duplicati.Library.Main.Operation.DeleteHandler.DoRun(LocalDeleteDatabase db, IDbTransaction& transaction, Boolean hasVerifiedBacked, Boolean forceCompact)
   at Duplicati.Library.Main.Operation.BackupHandler.CompactIfRequired(BackendManager backend, Int64 lastVolumeSize)
   at Duplicati.Library.Main.Operation.BackupHandler.Run(String[] sources, IFilter filter)
   at Duplicati.Library.Main.Controller.<>c__DisplayClass16_0.<Backup>b__0(BackupResults result)
   at Duplicati.Library.Main.Controller.RunAction[T](T result, String[]& paths, IFilter& filter, Action`1 method)
   at Duplicati.Library.Main.Controller.Backup(String[] inputsources, IFilter filter)
   at Duplicati.Server.Runner.Run(IRunnerData data, Boolean fromQueue)