Dear Experts, Please advise how to change conditions from RBXX to PB00 in PO? Payment exists.

Business users have issue with gross price in the PO. Somehow, the gross price in one of the line items vanished. We tried to change in conditions tab condition type from RBXX to PB00. But there is purchase history and payment already done.

My question is: Is it possible without reverse to change condition type in PO?

Thanks,

Botagoz