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SQL Server error code

SQL Server error 8477

SQL Server raises error 8477 at severity 16, which marks a problem with the query or data that you can correct.

An internal Service Broker error occurred (error = 0x%08x). This error indicates a serious problem with SQL Server. Check the SQL Server error log and the operating system error logs for information pointing to possible hardware problems. The database may have been damaged. To recover the database, restore the database from a clean backup. If no clean backup is available, consider running DBCC CHECKDB. Note that DBCC CHECKDB may remove data to repair the database.
Msg8477
Severity16
Group8000–8999

Source: Database Engine events and errors