Signals Notebook: Is it possible to delete Final Disposed item in inventory ?

If the container is in 'Final Disposed' status, as per the current design we cannot delete the container and material associated with that container and also this action cannot be undone, and no further actions can be performed on the container(s), including changing location. 

However we can delete the material if the container status is 'Disposed'.

Steps: 
a) Locate the container associated with materials and Restore , then delete the container 

b) Once you delete the container , you will be able to delete the materials associated with it.