diff --git a/modules/product_cost_fifo/move.py b/modules/product_cost_fifo/move.py
index 056c72d1ce..13d49f5d6c 100644
--- a/modules/product_cost_fifo/move.py
+++ b/modules/product_cost_fifo/move.py
@@ -29,11 +29,20 @@ class Move(metaclass=PoolMeta):
 
         t = cls.__table__()
         cls._sql_constraints += [
-            ('check_fifo_quantity_out',
+            ('check_fifo_quantity',
                 Check(t, t.quantity >= t.fifo_quantity),
                 'product_cost_fifo.msg_move_fifo_quantity_greater'),
             ]
 
+    @classmethod
+    def __register__(cls, module):
+        table_h = cls.__table_handler__(module)
+        super().__register__(module)
+
+        # Migration from 6.6: rename check_fifo_quantity_out to
+        # check_fifo_quantity
+        table_h.drop_constraint('check_fifo_quantity_out')
+
     @staticmethod
     def default_fifo_quantity():
         return 0.0