STEPS TO REPRODUCE
- Login as Admin
- Go to XWiki.DefaultSkin
- Click 'Edit this skin'
- On 'Overridden templates' section, click 'Add' on the existing template (e.g. file.vm) or add another .vm file
- Type something in the 'Content' field
- Click 'Save' or 'Save & View'
The page is saved with the respective modifications.
A version conflict window is displayed, as if the page was already saved in the meantime.
The issue could be reproduced also on XWiki 11.4.