Sometimes you notice unused tables in your database which begin with the prefix wpstg_.
You also may find tables prefixed with the string wpstgbak_
You can safely delete these tables with database administration tool of your choice (adminer, phpmyadmin)
These tables are ones which were created while the cloning process had been interrupted.
It’s on our to-do list to create a cleanup method which deletes orphaned staging site tables automatically. For, now, these tables need to be deleted manually.
In this article, we show you how to delete all these tables at once. This is useful if you notice a lot of orphaned tables.