diff --git a/apps/wallet/models.py b/apps/wallet/models.py
index 4b17b5c..b8adff7 100755
--- a/apps/wallet/models.py
+++ b/apps/wallet/models.py
@@ -31,6 +31,9 @@ class Account(BaseModel):
     owner_type = models.IntegerField(choices=TypeChoices.choices, db_index=True)
     balance = models.BigIntegerField(_('balance'), default=0)
 
+    # TODO: unique together wallet and owner_uuid
+    # TODO: performance check for performance issue of unique together
+
     objects = AccountQuerySet.as_manager()
 
     def get_owner(self):