Seaquel
SQL Server error code

SQL Server error 1901

SQL Server raises error 1901 at severity 16, which marks a problem with the query or data that you can correct.

Cannot create index or statistics '%.*ls' on view '%.*ls' because key column '%.*ls' is imprecise, computed and not persisted. Consider removing reference to column in view index or statistics key or changing column to be precise. If column is computed in base table consider marking it PERSISTED there.
Msg1901
Severity16
Group1000–1999

Source: Database Engine events and errors