Sonja on "[Plugin: Wordfence Security] duplicate tables"

I seem to have 2 sets of wordfence tables in a few of my sites. One is lowercase, the other mixed (camelcase?). Here is one example:

• wp_wfbadleechers
• wp_wfBadLeechers

How do I:

• Determine which is in use?
• Clean it up?
• Prevent this from happening again?

Any idea whether this was caused by some changes in WordFence or operating system differences when moving the site?

https://wordpress.org/plugins/wordfence/