Mass Changes for Contract conditions calculation object

Dear All,

I need the BAPI to change the contract condition's calculation object for the transaction RECN,

I have tried with the BAPI BAPI_RE_RO_CHANGE, but it allow me to update condition master data. Also I have debugged found the class behind program as CL_RECD_CONDITION.

Attaching screen shot for your reference. Kindly give yours input in order to fix my issue.

Many Thanks,