Why administrator is unable to delete Individual Learning Plan (ILP) ?

Why administrator is unable to delete Individual Learning Plan (ILP) ?

Symptoms:

The administrator is unable to delete the ILP under Learning -> Employee Learning -> Learning Data -> Learning Plan.

Possible cause(s):

ILP can only be deleted in draft mode, once the ILP has been submitted for approval, it can no longer be deleted.

Suggested workaround / Solution(s):

This is by system design.