How to resolve intra role conflicts

Deal All,

Need your help on approach that needs to be taken to remediate the intra role SOD conflicts arising for users in the system,

I have explained them the details on how they can resolvewhich requires redesign of roles but client is not at all willing to do a redesign of roles because they have invested a lot in their current auth design.

Can you help on how do we go on removing these risks,

Thanks,

Uttam