diff --git a/dashboard.py b/dashboard.py
index 7f1b01dedc..479ffdcd12 100644
--- a/dashboard.py
+++ b/dashboard.py
@@ -22,12 +22,3 @@ class DashboardAction(sequence_ordered(), ModelSQL, ModelView):
                     ('groups', '=', None),
                 ],
             ])
-
-    @classmethod
-    def __register__(cls, module_name):
-        super(DashboardAction, cls).__register__(module_name)
-
-        table = cls.__table_handler__(module_name)
-
-        # Migration from 2.4: drop required on sequence
-        table.not_null_action('sequence', action='remove')
diff --git a/res.py b/res.py
index dce60c35ad..e61440a880 100644
--- a/res.py
+++ b/res.py
@@ -26,15 +26,6 @@ class User(metaclass=PoolMeta):
             'dashboard_actions',
             ]
 
-    @classmethod
-    def __register__(cls, module_name):
-        super(User, cls).__register__(module_name)
-
-        table = cls.__table_handler__(module_name)
-
-        # Migration from 1.6
-        table.not_null_action('dashboard_layout', action='remove')
-
     @staticmethod
     def default_dashboard_layout():
         return 'square'