builder mixin: Supply calculation use default supply value even if not stock definition is found

bt5/erp5_base/MixinTemplateItem/portal_components/mixin.erp5.BuilderMixin.py

@@ -537,8 +537,9 @@ class BuilderMixin(XMLObject, Amount, Predicate):
         min_stock_value = getCorrectSupplyParameter(selected_supply, supply, 'getMinOrderQuantity') / getDefaultQuantityUnitFlowQuantityUnitConversionRatio(selected_supply, supply)
         factor = getCorrectSupplyParameter(selected_supply, supply, 'getMinFlow')
       else:
-        min_stock_value = original_min_stock_value
-        factor = original_factor
+        # Fallback to current supply values
+        min_stock_value = supply.getMinOrderQuantity() / default_quantity_unit_flow_quantity_unit_conversion_ratio
+        factor = supply.getMinFlow()
       period_history_list = []
 
       if next_period_history_list and\