Backend error : enter plant

Hello Experts,

We are running on SRM 7.0 SP12, We have an issue while ordering the PO after all the approval's and when the system tries to transfer the PO to ECC

we have an error "Backend error : enter plant"

When we switch off the change badi we don't have this issue and the PO is transferred to ECC. When we checked the implementation there is no logic related to plant and even in the exporting parameter's item table(et_item) we don't have the field for plant, so technically we cannot change the plant data inside the badi.

Please advice.

Thanks&Regards,

Praveen