diff --git a/aleksis/apps/paweljong/models.py b/aleksis/apps/paweljong/models.py
index 7cd34a596f16772380b6000d18d0d9ecffe1ae3f..57c1dc3ab9bb2f61d725be959fb665e615b280d8 100644
--- a/aleksis/apps/paweljong/models.py
+++ b/aleksis/apps/paweljong/models.py
@@ -288,11 +288,6 @@ class EventRegistration(ExtensibleModel):
     def retract(self):
         # Remove person from group
         self.event.linked_group.members.remove(self.person)
-        # Invoice
-        inv = self.get_invoice()
-        inv.for_object = None
-        inv.for_object_class = None
-        inv.save()
         # Mark registration as retracted
         self.retracted = True
         self.retracted_date = datetime.today()