Need to change EBAN-KONNR & EBAN-KTPNR

Dear Experts,

I am trying to change the agreement number and agreement item number in the purchase requisition post MRP.

Have checked using the BAPI "BAPI_REQUISITION_CHANGE"& FM "CLOI_EBAN_CHG" but not succeeded.

Pls let me know if there is any way out.

Thanks in advance.