Getting this error when trying to do a credit card refund in App10

On or original CC payment there is no check or series referenced.

Where am I missing a basic data setup. I went through all the payment documents series and all look good
Getting this error when trying to do a credit card refund in App10

On or original CC payment there is no check or series referenced.

Where am I missing a basic data setup. I went through all the payment documents series and all look good
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