Hi Dhiman,
Norman's suggestion would work for centralized scenario where GRC is used only for risk analysis and priv is assigned by IDM.
From your description, I understand that you are using GRC for risk analysis and for SAP systems provisioning (Distributed scenario).
If so, then you should use BYPASS_MEMBER_TASK=1 instead of BYPASS_VALIDATE_TASK=1.
We had used a script to add "{A}{BYPASS_MEMBER_TASK=1}" before, and "|" after, all the priv's to be assigned and return the string to MXREF_MX_PRIVILEGE
Kind regards,
Jaisuryan