Expired Stripe API key/wrong API key

Having some trouble with the Stripe plugin. I have a user trying to pay another user (Stripe Connect) and he keeps getting this error message:

“Stripe error Expired API Key provided: sk_live_********************HdEd”

That would make sense, but thing is, that isn’t the API key I have listed in either the Stripe plugin OR on the Stripe Dashboard. I’ve tried charges (both live and test) on my end and I cannot reproduce the error, but I can see the error in the logs that my user is getting.

Anyone have any idea what’s going on here?