SQL Server error code
SQL Server error 3056
SQL Server raises error 3056 at severity 16, which marks a problem with the query or data that you can correct.
The backup operation has detected an unexpected file in a FILESTREAM container. The backup operation will continue and include file '%ls'.
| Msg | 3056 |
|---|---|
| Name | DMPDB_INVALID_FSDATA |
| Severity | 16 |
| Group | 3000–3999 |
What it means
Error 3056 is raised if files exist under the FILESTREAM container (folder) that aren't created by SQL Server. The backup operation will include that file, but this will cause an inconsistent state of the filestream components in the database.