Hi, On an instance of Keycloak I have strange errors when browsing some realms (Http 404 on some requests). After some invetigation, the root problem seems to be in realm database table : keycloak=# select id, name from realm; id | name --------------------------------------+----------- master | master 5433f7c8-7420-428c-82bc-d96a76da1afe | demorealm b1a5a9f6-5f85-489f-8656-25e5307088be | test 016cc42d-8f46-4007-8054-e8bd7a923fa5 | testrealm test2 | test2 For example the groups REST resource expects a name in URL context, but Angular admin GUI use the realm Id and so get a 404. Realms were created from Keycloak v3.1.0 until last v3.4.1. Is there some data migration to do manually (or has previously failed ?). Or is the groups REST resource expecting the wrong parameter ? Thanks.