SQL Server error code
SQL Server error 4901
SQL Server raises error 4901 at severity 16, which marks a problem with the query or data that you can correct.
ALTER TABLE only allows columns to be added that can contain nulls, or have a DEFAULT definition specified, or the column being added is an identity or timestamp column, or alternatively if none of the previous conditions are satisfied the table must be empty to allow addition of this column. Column '%.*ls' cannot be added to non-empty table '%.*ls' because it does not satisfy these conditions.
| Msg | 4901 |
|---|---|
| Severity | 16 |
| Group | 4000–4999 |