Error - 'The values to match should have the same sign as the original order line they are matching' when matching an invoice to an order

This occurs when the order line being matched has a different sign (positive or negative) on the value when compared to the value on the invoice that it is being matched against.
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To resolve this issue - our support team will need to investigate, run scripts or liaise with the hosting or development teams. Any Issues with contacting us, please see the following Get support in Financial Operations.