[IMP]stock_ux: _check_manual_lines method

stock_ux/models/stock_move_line.py

@@ -64,10 +64,17 @@ def _check_manual_lines(self):
         if any(self.filtered(
                 lambda x:
                 not x.location_id.should_bypass_reservation() and
-                x.picking_id.picking_type_id.block_manual_lines)):
+                x.picking_id.picking_type_id.block_manual_lines and
+                x._check_reserved_quantity() < x.quantity)):
             raise ValidationError(_(
                 "You can't transfer more quantity than reserved one!"))
 
+    def _check_reserved_quantity(self):
+        sum = 0
+        for  rec in self.picking_id.move_line_ids:
+            sum += rec.quantity
+        return sum
+
     @api.constrains('quantity')
     def _check_quantity(self):
         """If we work on move lines we want to ensure quantities are ok"""