Revesing a payment recieved for an Invoice posted to wrong customer

Received payment  posted it to the wrong Customer.  I tried to do a JE but got an error

saying  you can't have two AR/ AP on the same entry. 

I was :

Debiting the AR for Customer 1 (wrong customer)

Crediting the AR for Customer 2 (Correct customer)

Is there another way to correct this error?

I am using Quickbooks Desktop Pro

The error occurred in April.

Thanks in advance for your help.