Seaquel
SQL Server error code

SQL Server error 652

SQL Server raises error 652 at severity 16, which marks a problem with the query or data that you can correct.

The index "%.*ls" for table "%.*ls" (RowsetId %I64d) resides on a read-only filegroup ("%.*ls"), which cannot be modified.
Msg652
Severity16
Group0–999

Source: Database Engine events and errors