How to Enter a Negative Amount in Customer Minimum Receipt Amount?

Hi Gurus,

When I ran the Automatic Receipt Program, I received an exception error for my Credit Memo. It says "This invoice does not meet the minimum invoice amount specified for this customer."

So I figured out to update the customer setup for Profile Amounts and tried to place -100000 in the Minimum Receipt Amount.

But I got the following error: "Row 1 Min Receipt Amount - Please enter a value for Min Receipt Amount equal to or greater than zero."

Can you please help on finding out how to add a negative value in Min Receipt Amount? Are there other ways so I can create an automatic receipt for my credit memo?