Selvin,
Just the recap of scenario as I understood it - You change a Parent role in Dev & generate the child roles from Parent role, then the transport goes to QA, Pre-Production & Production without any errors i.e. the generated profile gets transported OK, but AGR_1252 values are getting updated only in QA & Pre-PRD only & not in PRD. In PRD, the values get updated once you generate the already generated profile again.
Have you done any customization in your PRD system that may have affected AGR_1252?
Regards,
Shivraj Singh