Seaquel
SQL Server error code

SQL Server error 3137

SQL Server raises error 3137 at severity 16, which marks a problem with the query or data that you can correct.

Database cannot be reverted. Either the primary or the snapshot names are improperly specified, all other snapshots have not been dropped, or there are missing files.
Msg3137
Severity16
Group3000–3999

Source: Database Engine events and errors