Outlook 2010 (NOT Exchange Server), Win 10 64

I have a To Do that I cannot delete, remove, rename, or perform any other action on. When trying I keep getting "The message you specified could not be found." It’s aggravating because it’s at the top of my TO DO list, both in Task View and in the To Do Bar. It was generated by a TASK, which has long been removed and is no longer in deleted folder.

I’ve run SCANPST as well as another PST repair utility with no luck. I’ve run Scannow.

Any suggestions on how to remove this To Do?

Thanks much for any assistance.