Seaquel
SQL Server error code

SQL Server error 8663

SQL Server raises error 8663 at severity 16, which marks a problem with the query or data that you can correct.

Cannot create the clustered index "%.*ls" on view "%.*ls" because its select list does not include COUNT_BIG(*). Consider adding COUNT_BIG(*) to the select list.
Msg8663
Severity16
Group8000–8999

Source: Database Engine events and errors