Hi @Debayan Mukherjee​ ,

Thank you for your answer, but no it does not help. The problem is that if a group is deleted, the grants on the tables/schemas/catalogs on this group are in a bad state. There is no way to revoke the grants, because it cant find the group that was deleted with this error "Could not find principal with name ...". Only way to recover a good state is to delete the table/schema/catalog, and this is not good solution.

It's as if the grant on the table is assigned an id, and this id is not found anymore. The delete group action should not be possible if grants are still referencing the group, or the delete group action should remove the grants.