You cannot set this Enterprise Resource Outline Code value. You already have the maximum number of values on the corresponding ...

You cannot set this Enterprise Resource Outline Code value. You already have the maximum number of values on the corresponding Enterprise Resource Multi-Value.  Since the value on the Enterprise Resource Outline Code is always added to the corresponding Enterprise Resource Multi-Value, this action would put you over the limit.  In order to perform this action, please remove some values from the Enterprise Resource Multi-Value with the same name.