Error : Creating PO with reference to Contract"CALL_OFF_CREATED"

Hi Experts,

I am working on Extended Classic Scenario, We have created the Contract document in SRM and it replicates to ECC system successfully. While converting the contract document into Purchase Order document in the SRM system we are facing this error msg.

Pl help on this.

Process CALL_OFF_CREATED not assigned to number type in version CALL_OFF_CREATED

Regards,

Mohan