This appears to happen when I edit an org file in another Emacs instance:
Warning (org-element-cache): org-element--cache: Added org-data parent
to non-headline element: (planning (:closed nil :deadline nil :scheduled
(timestamp (:type active :raw-value "<2023-06-16 Fri +1w>" :year-start
2023
just standard auto-revert-mode.
As I mentioned previously, I run multiple Emacs daemons. This happens
when I change an org file in one daemon instance and auto-revert-mode
detects the change and reverts the buffer in another daemon instance.
--
Peter J. Jones
Founder, Devalot.com