After spending over an hour, trying to figure out why I was getting "Record changed by another user" when I was editing and clicking the save button, I found the issue
In a Query, I have an inline button that started the EDIT function (not call a process but just EDIT) and had Modal window selected. (I do that when I add records and NO problem), but with Modal and edit. If I change anything, then attempt to save, I get the Record changed error.
I changed Modal to Popup and all works fine.
bruce