Seaquel
SQL Server error code

SQL Server error 3098

SQL Server raises error 3098 at severity 16, which marks a problem with the query or data that you can correct.

The backup cannot be performed because '%ls' was requested after the media was formatted with an incompatible structure. To append to this media set, either omit '%ls' or specify '%ls'. Alternatively, you can create a new media set by using WITH FORMAT in your BACKUP statement. If you use WITH FORMAT on an existing media set, all its backup sets will be overwritten.
Msg3098
Severity16
Group3000–3999

Source: Database Engine events and errors