I have deleted incomplete task items that are being pulled into a task report that filters to incomplete tasks.
When I attempt to mark these action items as 'complete' (checkbox = TRUE) in the published task report, I receive an error message (see image below)

I am unable to mark the action items as complete in the original pages because the tasks no longer exist.
It seems to be a bug and would like support to assist me in eliminating the tasks labeled as 'Topic 1' or 'Topic 2'.
Can someone point me in the right direction?