Seaquel
SQL Server error code

SQL Server error 6279

SQL Server raises error 6279 at severity 16, which marks a problem with the query or data that you can correct.

ALTER ASSEMBLY failed because the mutator attribute of method '%s' in type '%s' would change in the updated assembly, and the method is in use by the schema-bound function or view '%s'.
Msg6279
Severity16
Group6000–6999

Source: Database Engine events and errors