The Allow Nulls property can't be set on column '<0s>' because it is an identity column.

Message Text

The Allow Nulls property can't be set on column '<0s>' because it is an identity column.

Explanation

All identity columns must contain unique values other than NULL.

Action

To make the column an identity column, first clear the Allow nulls check box on the Column Property dialog box.

See Also

Modifying Column Properties