diff --git a/xmpp/handlers.go b/xmpp/handlers.go
index afb5027..d21c394 100644
--- a/xmpp/handlers.go
+++ b/xmpp/handlers.go
@@ -1813,6 +1813,11 @@ func handleSetQueryMucAdmin(s xmpp.Sender, iq *stanza.IQ, query *extensions.Quer
 
 		var status telegram.ChatMemberStatus
 
+		if item.Role != "" && item.Affiliation != "" {
+			iqAnswerSetError(answer, 400)
+			return
+		}
+
 		switch item.Role {
 		case "none":
 			status = telegram.ChatMemberStatusKicked
@@ -1823,7 +1828,6 @@ func handleSetQueryMucAdmin(s xmpp.Sender, iq *stanza.IQ, query *extensions.Quer
 		case "moderator":
 			status = telegram.ChatMemberStatusPromoted
 		}
-		// affiliations have a higher priority over roles
 		switch item.Affiliation {
 		case "none":
 			status = telegram.ChatMemberStatusKicked