Hi Tobias,
I'm currently migrating over a site to a new web network that I've joined and we have everything transferred over correctly except my 333 Tablepress tables (IDs 1-333).
I tried a Tablepress csv export/import to the new site but found that the table numbering was affected because I had 7 tables deleted in my original installation. So the new install only had tables numbered 1-327, and the numbering for all ended up being off. I would have had to go through my 400+ posts one-by-one and update the table IDs in the shortcodes. Plus, the csv file didn't contain my table titles, descriptions, and other customizations.
I then thought I'd do a WP Tools > XML export of the Tablepress files. The xml contains the titles and other data I'd like to transfer over. After resetting the last_id to 0 in options.php I tried to import the xml file. BUT I still get an error that the table IDs already exist (1-333).
Do I need to purge a database table or something in addition to resetting last_id to 0?
Many thanks,
Nathan