The problem is that "...bundled_items/item/{bundled_item_id}" gives 404, should just be "bundled_items/{bundled_item_id}".
Created attachment 188019 [details] [review] Bug 41035: remove invalid path component 'item' To test: 1. Create a record as a collection with leader 007 set to c 2. Add some items on the same branch to the bundle 3. Check one item in 4. Observe that you get a 404 error and the item is not removed from the bundle 5. Apply the patch 6. Repeat step 3 7. Observe that the item is correctly removed (unlinked) from the bundle 8. Sign off