Received unknown paypal payment

Posted 29th Mar 2022
I just received a £40 paypal payment in my paypal account. Transferred by friends and family and from an email address I do not recognize. 15 minutes after this transfer I received a money request for the £40 to my paypal account with a note saying "I sent payment to you by mistake can you refund it back please".
The email my paypal uses is pretty unusual and so pretty unlikely it could be accidentally mis-typed by someone and the email account is only used for purchases and bills, not personal emails,
I have no desire to keep the money, but is it possible I could be opening myself to a scam if I issue a refund of the money.
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