RequisitionApprovalEmailReport customizations not reflecting in output Mail

Summary:
I have a customized RequisitionApprovalEmailReport. Which is working fine. We can see all the customization in that report. Earlier, added few fields (DFF Values) in template. New requirement came up to apply some logic on DFF values. I made changes in data model and assigned it to report under custom folder. but changes are not reflecting in report output.
As per few oracle document I have waited for more than 24 hrs and even tried to Set Profile Option but still this is showing previous data.

Set Profile Option (Temporary): Set the profile option BIP_CLIENT_REFRESH_TIME to a low value (e.g., 15 minutes) to force faster template refreshing during testing.