ngg tables being added to multisite-installation while no longer installed

Hi!

I was looking through our database and discovered a lot of empty tables like wp_[blogId]_ngg_gallery, wp_[blogId]_ngg_pictures and wp_[blogId]_ngg_album, in addition to the non-multisite tables wp_ngg_pictures, wp_ngg_album and wp_ngg_gallery.

After some investigation I figured out it’s most likely from this plugin, and that it was last installed many years ago, as I didn’t know we’ve ever had it myself. For example in the plugins-folder I found the folder nextgen-gallery. However the only files left in that folder is nextgen-gallery/index.html and nextgen-gallery/products/photocrati_nextgen/modules/ngglegacy/admin/css/images/ui-anim_basic_16x16.gif. The plugin does not appear in the plugin list. The folder mu-plugins is empty.

There is also folder wp-content/ngg, but that just consists of a bunch of empty folders.

Regardless of the fact the plugin apparently hasn’t been installed for a long time, and there seems to be no residual plugin php files, these tables are somehow still created when a new blog is created.

I would like to remove these tables, since they are empty anyway and of no value to us. However, I would also like to prevent them being added to future blogs added to the multisite installation.

I’ve tried to look search for ngg in both option_name/meta_name and option_value/meta_value in both wp_options and wp_sitemeta tables, and while I’ve found some entries relating to the plugin, I haven’t found something that would help explain the creation of tables.

Hope you can help and put me on the right track to solving this.

Best regards