Manufacture date from the creation date of the inspection lot

We are currently pulling the Manufactured on date from the creation date of the inspection lot. That doesn’t match the manufacturing date. My question is surrounding SAP standard practice. If this date does not match the actual manufacturing date, what date does SAP recommend? Should we try pulling from the batch record, since you can maintain a manufacturing date? I can change the fields in the COA from QALS-ERSTELDAT to MCHA-HSDAT. I just don’t know if that is the right way to handle it.