patch
https://sandbox.uk.rootplatform.com/v1/insurance/tasks//checklist//not-applicable
Marks a required checklist item as not applicable, or restores it. A checklist item marked not applicable counts as resolved, so it no longer blocks the task from being completed. Only a required checklist item can be marked; optional items never block completion.
The task is complete or cancelled. Marking an item not applicable, or restoring it, always changes whether it still blocks completion, so it is always refused here. Reopen a completed task first; a cancelled task cannot be reopened.