Error while saving customer master "ENTER ONLY IN FROM BADI"

Hello SAP specialists,

I get an error message while saving a customer master data in SAP SD.

The error reads as "ENTER ONLY IN FROM BADI"

I am an intermediate SAP user, not sure what the error means.

Requesting your valuable suggestions to get rid of this error.

I have also attached a print screen of the screen that system takes me to when the error pops.

Thanks in advance.