Seaquel
SQL Server error code

SQL Server error 3054

SQL Server raises error 3054 at severity 16, which marks a problem with the query or data that you can correct.

Differential file backups can include only read-only data for databases using the simple recovery model. Consider taking a partial backup by specifying READ_WRITE_FILEGROUPS.
Msg3054
Severity16
Group3000–3999

Source: Database Engine events and errors