ID:251002 Can't recognize value <text> as a legal integer -- specify a legal integer

CAUSE: You attempted to edit an assignment in the Assignment Editor and the assignment requires that you specify a legal integer value, but the Quartus Prime software does not recognize the specified value. The Quartus Prime software cannot accept illegal values. If a previous legal value exists, the Quartus Prime software will revert to the previous assignment value.

ACTION: Change the value of the assignment so that it contains only numeric characters.