diff --git a/app/models/groups.py b/app/models/groups.py
index 7c87d442f..8b890a6ac 100644
--- a/app/models/groups.py
+++ b/app/models/groups.py
@@ -129,12 +129,8 @@ class GroupDescr(db.Model):
 
     def to_dict(self, with_partition=True) -> dict:
         """as a dict, with or without partition"""
-        d = {
-            "id": self.id,
-            "partition_id": self.partition_id,
-            "name": self.group_name,
-            "numero": self.numero,
-        }
+        d = dict(self.__dict__)
+        d.pop("_sa_instance_state", None)
         if with_partition:
             d["partition"] = self.partition.to_dict(with_groups=False)
         return d