Hello,
My account has a System Administrator role assigned but when I try to assign a System Administrator Role to any existing or new users I receive the following error:

and error details are below:
</ErrorDetails>
<Message>RoleService::VerifyCallerPrivileges failed. User: 91b56c28-51d6-e911-80cc-2c56fd7cc78b, PrivilegeName: prvDeleteRecordChangeHistory, PrivilegeId: 2caa63a2-05t6-43dd-96621-358c6b61ee01, Depth: Global, BusinessUnitId: ba7d807f-96a9-e311-8256-00778d643002</Message>
<Timestamp>2020-04-24T23:12:39.0505234Z</Timestamp>
Would you please let me know how to fix this issue?
Thanks.