I have the exact same problem as the OP
Before finding this topic found:
How to Undo Official Warning
specifically
While I do have admin rights to the site, I do not have SSH into the server.
Discourse site: SWI-Prolog
EDIT 09/05/2019
Related but different issue: How to unflag or unignore a flagged post
Any status change on this? Would using SSH be a possible way to revert the choice?