How to bring back invested Steem?

Hello everyone! It has been quite awhile since I've been on this platform! I'm looking to get back into posting, but I have one issue that I can't seem to figure out no matter how much I Google. A majority of my Steempower shows as (-839) below my actual Steempower of 860. I realize this means I powered up another account temporarily, but I can't figure out what account that was or how to recall it back to me.

I appreciate any help!