modules/purchase_trade/sale.py

@@ -545,8 +545,8 @@ class SaleLine(metaclass=PoolMeta):
     @property
     def report_fixing_rule(self):
         pricing_rule = ''
-        if self.lines:
-            pricing_rule = self.lines[0].pricing_rule
+        if self.pricing_rule:
+            pricing_rule = self.pricing_rule
         return pricing_rule
 
     @property