SumUp refunds broken "already been refunded on another POS."

[NewHopeCharity]

Running SumUp v2.64, Loyverse v2.36 on a Sumni T2 terminal (Android 8). Having just updated the SumUp and Loyverse software credit card refunds have stopped working. I know the error message "Unable to make a refund. Item(-s) have already been refunded on another POS" is spurious because the transaction and refund were made sequentially, out of trading hours when I was the sole till operator.

If you need it for investigating here's one of the receipts with it's transaction details.

[Shinjin]

Hello,

Could you please tell us if you have tried refunding other receipts?

Have you only recently added Sumup as a payment type to your Loyverse account?

We will be waiting for your reply.

[NewHopeCharity]

Hi Shinjin,

Yes, cash refunds are processed correctly, but no card refunds succeed.

SumUp has been part of the Loyverse setup from inception but I have recently reinstalled both applications as part of troubleshooting previous SumUp transactional errors. (see Sumup account error thread)

)

[Shinjin]

Hello, 

As mentioned in the quoted thread, have you tried disconnecting the Sumup account in the Back Office --> Settings --> Payment types page and then reconnecting it again?

Please try and let us know the results.

[NewHopeCharity]

I have previously but I will try this again and report back since the software versions have moved on.

[Shinjin]

Thank you for letting us know, we will be waiting for your feedback.