diff --git a/tw2/sqla/widgets.py b/tw2/sqla/widgets.py
index f799092..af6ebbd 100644
--- a/tw2/sqla/widgets.py
+++ b/tw2/sqla/widgets.py
@@ -122,7 +122,9 @@ def has_value(dic):
         elif self.required_children:
             if not has_value(value):
                 # No problem, no value posted.
-                return value
+                # We return None to make sure we will delete the onetoone field
+                # or not create it
+                return None
 
             error_dict = {}
             for c in self.required_children: