diff --git a/tower_cli/cli/transfer/send.py b/tower_cli/cli/transfer/send.py
index 3696f2f8..97ae9d11 100644
--- a/tower_cli/cli/transfer/send.py
+++ b/tower_cli/cli/transfer/send.py
@@ -1500,7 +1500,7 @@ def import_notification_relations(self, asset, new_notifications, notification_t
             # If the notification is already in the existing_notifications we don't need to do anything
             # Just remove it from the existing notifications so we dont delete it
             if notification_name in existing_notifications:
-                del existing_notifications[notification_name]
+                existing_notifications.remove(notification_name)
                 continue
 
             try: