Overwrite existing user role mapping based on IDP mapper of claim to Group in KC 23

Hi there, I was trying to achieve the following things within Keycloak 23.X via KC Console UI : the existing role mappings for the user ( “role1”, “role2”, “role3”) I need to override them with no role attached at all anymore when initiating login action, by mapping within an IDP a claim “claim1” having the value “no_access” to an empty group “group_no_access” which has no child groups, no members, no attributes, no role mapping and no permissions set.
Are my expectations correct ? If not how could I achieve this?

Thanks in advance for the advice,