diff --git a/ayanova/devdocs/todo.txt b/ayanova/devdocs/todo.txt
index b58cd5df..6712f401 100644
--- a/ayanova/devdocs/todo.txt
+++ b/ayanova/devdocs/todo.txt
@@ -183,7 +183,7 @@ todo: restock required feature
 	dialog?  See notes case 3849
 todo: MIGRATE_OUTSTANDING note for part requests feature
 	maybe add UI button etc for it even with no actual list / form or whatever
-
+todo: test add / remove serials via any and all updates changes to po items
 todo: test reports, tagging etc
 todo: can edit po number but if I set an existing po number 4 to 23 for example and the last autogenerated is 22 it will happily make another 23 so there are now two
 	what I want to happen is it skips existing numbers