Prevent the creation of a duplicate gogs user if you have the gogs plugin enabled

taiga/hooks/gogs/migrations/0001_initial.py

@@ -15,6 +15,8 @@ def create_gogs_system_user(apps, schema_editor):
     # if we directly import it, it'll be the wrong version
     User = apps.get_model("users", "User")
     db_alias = schema_editor.connection.alias
+
+    if not User.objects.using(db_alias).filter(is_system=True, username__startswith="gogs-").exists():
         random_hash = uuid.uuid4().hex
         user = User.objects.using(db_alias).create(
             username="gogs-{}".format(random_hash),