Lock Track is stuck

After all the years I’ve been using Cubase, I still get flummoxed by the simple things. Sigh. One of my midi tracks is locked suck that no editing at all is possible. I can see the Lock on the track and the Inspector but they will not toggle off. While I am sure this is an easy fix, I have not found the solution. So again I turn to the Masters. Ideas?

I will attach a screenshot.

Apologies for the my misspelling of “such”. It was, perhaps, a symptom of subliminal frustration.