[FIX] Apply flush

Author: BT-dmoreno

partner_multi_relation/models/res_partner_relation_type.py

@@ -95,6 +95,7 @@ def _end_active_relations(self, relations):
                 relations_to_update += relation
         relations_to_delete.unlink()
         relations_to_update.write({"date_end": today})
+        self.env.flush_all()
 
     def check_existing(self, vals):
         """Check wether records exist that do not fit new criteria."""