I've spent a fair while reading about the "Could not insert term into the database" error, but the fixes I have read (changing theme, fresh WP install, disable plugins) simply are not working.
I tried a force DB upgrade, still no joy.
wp_terms there's a category with
term_id of 0. This is mighty strange and if I delete it, I'm then able to add a category via wp-admin. However, subsequent categories then fail with the "Could not insert term into the database" message and re-checking
wp_terms shows the freshly added category as id 0! This seems to suggest WP is assigning the cat a
term_id of 0 every time.
Has anyone seen this? Any ideas on a fix? The database in question is pretty huge, so a rebuild would not be a pretty thing.