Seaquel
SQL Server error code

SQL Server error 5529

SQL Server raises error 5529 at severity 16, which marks a problem with the query or data that you can correct.

Failed to remove a FILESTREAM file. The database is a primary database in an availability group. Wait for the FILESTREAM data files to be hardened on every secondary availability replica. Then retry the drop file operation.
Msg5529
Severity16
Group5000–5999

Source: Database Engine events and errors