diff --git a/backend/models/postgis/user.py b/backend/models/postgis/user.py
index a284653ac7..fb75ae9d46 100644
--- a/backend/models/postgis/user.py
+++ b/backend/models/postgis/user.py
@@ -109,7 +109,7 @@ def update(self, user_dto: UserDTO):
 
             try:
                 is_field_nullable = self.__table__.columns[attr].nullable
-                if is_field_nullable:
+                if is_field_nullable and value is not None:
                     setattr(self, attr, value)
                 elif value is not None:
                     setattr(self, attr, value)