Sometimes you notice unused tables in your database which begin with the prefix
You can safely delete those tables with your database administration tool (adminer, phpmyadmin)
Those tables are ones which were created while the cloning process had been interrupted.
It’s on our to do list to create a clean up method which asks you to delete unused staging tables automatically. For now they need to be deleted manually.
In the database you will also find tables prefixed with the string
wpstgbak_ tables are not deleted automatically as well and we make sure to take those tables into account as well for the clean up routine.