Hi! I wanted to migrate from Flavor to Explicit but, when I started to create the categories to match with minisites, there are some of then which appear with the -2 at the end of the slug
I tried to delete every page and category which could have the same slug but I canÂ´t make it, and I canÂ´t keep with the migration without this
Finally, it only happens with a certain category (sitios). The rest slug issues were solved when I deleted the tags called the same way but, I canÂ´t fix that one and I checked for almost everything (pages, tags, taxonomies...)
Whenever WordPress detects something with a name already in use it adds -2. So categories, tags, pages, taxonomies, custom post types, etc. Try rebuilding your permalinks and/or checking your trash.