Add new posts button only creates revisions of former posts

[francishunger]

Hi,

When I press the "Add new Posts" button, a new post is only created immediately after the first login. Subsequently whenever I want to add a new post, the same former post is overwritten. This get's visible, when the permalink of a supposedly new post is actually the old permalink.

This might be a Gutenberg issue, since it appeared after installing Gutenberg and subsequently de-activating it, but it might not, since I'm note certain if that is related.

I assume it is a database issue. In Php-Admin it was visible, that new post IDs were created, but they always had the parent-ID set to the former Post, not to 0 (which I assume would constitute a new post).

I have tried to no avail:

• deactivating all plugins
• reinstalling wordpress after deleting the files, also reinstalling an older version 4.8, then again updating it.
• running database plugins to delete postrevisions and transients
• activate standard theme
• installing a new wp with a fresh database and importing the posts
• issue appeared both in chrome and safari (latest) under osx, with extensions on and off.
• consulting the wordpress org support
• the problem also appears with a new custom post type, which I added

[francishunger]

Phpmyadmin screenshot

[SergeyBiryukov]

Hi @francishunger, welcome to WordPress Trac! Thanks for the report.

Issues like this are generally caused by the server forcibly setting Cache-Control for all pages, including the admin.

See comment:12:ticket:37889 for more details.

[francishunger]

Hi @SergeyBiryukov,

thanks for pointing me to the solution in comment:12:ticket:37889

F.

[SergeyBiryukov]

Thanks for the follow-up! :)