I am pruning my WordPress site's MySQL database and noticed that there are thousands of rows in the postmeta
table with the prefix "BS_".
BS_author_type
BS_guest_author_name
BS_guest_author_url
BS_guest_author_description
BS_guest_author_image_id
Are these generated by WordPress or by a plugin that I might have added and removed before? I tried googling the meta-keys as well as the prefix BS_
and the only result I got is a Romanian webpage with random code and a few images on it.