The identity increment must be a number containing <Maximum> digits or less. (Visual Database Tools)

You have entered an invalid value for the identity increment field. Enter an integer whose magnitude is less than the maximum indicated in the error message. If the data type of the column is TINYINT, you must enter a positive number. For any other data type, you can enter a positive or negative number.

See Also

Concepts

Error Messages in Visual Database Tools

Help and Information

Getting SQL Server 2005 Assistance