XF 2.3 No previous version of the parent could be found. Merging is not possible.

[island]

XF 2.3.13 upgrade from XF 2.3.10:

Main style PAGE_CONTAINER merged fine.

I had created a second style in 2.3.10 that is not user selectable for use on a specific page, and on the second style when I try and Merge the PAGE_CONTAINER template, it returns:
No previous version of the parent could be found. Merging is not possible.

However, it says under the second style for PAGE_CONTAINER template:
Last edited: Jun 28, 2026 Parent last edited: 3 minutes ago

Curious: when it says parent last edited 3 minutes ago, but also no previous version of the parent, what is it looking for here?

Under templates it shows
Default Style (PAGE_CONTAINER merged successfully after upgrade)
---second style (where PAGE_CONTAINER was customized and will not merge now)

 

[island]

Resolved by editing the second style customized PAGE_CONTAINER template manually to be sure it didn't have anything conflicting with the 2.3.13 update.

So all is working fine with no outdated templates.

Unsure if it was the way the second style was created based on the default style or the fact that the PAGE_CONTAINER had been customized too much for the merge function's diff function to compare with the default template.

 

[Mendalla]

I had similar after upgrading to 2.3.12. Just hit Save and it was fine after that. Given you went from .10 to .13, maybe you hit the same thing I did.