Hi, I'm a Jira Admin at my company, and I wanted to disable Sub-tasks from the system.
All sub-tasks were migrated to tasks:

Unfortunately, somehow the system still accuses the existence of Sub-tasks.

Is there a delay between the time I migrate the old sub-tasks and the system recognize there are no sub-tasks remaining or is there some other possible types I missed?
PS: this is the list of types the system accused for me:
