CCTR POU different than ordering unit

Dear Experts,

I am working on SRM 7 EHP 2, and am creating central contract with material having different ordering unit (EA) than the price order unit (M2).

Please let me know for a contract item, how to change the price order unit which is a non editable field & taking the unit (EA) instead of (M2), which I have maintained in the material master & replicated to SRM.

Regards,

Ravindra K.