Allow null values for musicbrainz_id in Audio ActivityPub representation

api/funkwhale_api/federation/serializers.py

@@ -662,17 +662,17 @@ class CollectionPageSerializer(serializers.Serializer):
 
 
 class ArtistMetadataSerializer(serializers.Serializer):
-    musicbrainz_id = serializers.UUIDField(required=False)
+    musicbrainz_id = serializers.UUIDField(required=False, allow_null=True)
     name = serializers.CharField()
 
 
 class ReleaseMetadataSerializer(serializers.Serializer):
-    musicbrainz_id = serializers.UUIDField(required=False)
+    musicbrainz_id = serializers.UUIDField(required=False, allow_null=True)
     title = serializers.CharField()
 
 
 class RecordingMetadataSerializer(serializers.Serializer):
-    musicbrainz_id = serializers.UUIDField(required=False)
+    musicbrainz_id = serializers.UUIDField(required=False, allow_null=True)
     title = serializers.CharField()
 
 

changes/changelog.d/mbid.bugfix

@@ -0,0 +1 @@
+Allow null values for musicbrainz_id in Audio ActivityPub representation