Check the wp_config.php file… look for a line that reads:
$table_prefix = 'qfo_';
Or…
$table_prefix = 'wpax_';
Which ever one is set in wp_config.php is the one that your WordPress site is using. If the tables aren’t being used then they’re not really doing any harm other than taking up space, but once you’re sure you’ve got everything you need from them then you can probably just drop them from the database.
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