Seaquel
SQL Server error code

SQL Server error 3263

SQL Server raises error 3263 at severity 16, which marks a problem with the query or data that you can correct.

Cannot use the volume on device '%ls' as a continuation volume. It is sequence number %d of family %d for the current media set. Insert a new volume, or sequence number %d of family %d for the current set.
Msg3263
Severity16
Group3000–3999

Source: Database Engine events and errors