Hi Anjan
I don't think there is anything standard. You will have to look at modifying the code for the re-confirm. Possibly a user-exit instead
It won't help you now but there might be value in adding this suggestion to SAP ideas space to for manager authentication to be based on a data source instead of GRC SU01. I've seen this scenario come up a few times (and had same issue for authentication with my solution - I was lucky that I didn't have GxP compliance to factor in).
Regards
Colleen