Issue when performing reversal via Fiori Apps Supplier Invoices List

[jialey]

I have posted invoice with reference INV 123, I am able to perform reversal in MR8M. However, if similar scenario invoice is posted with different reference, I am not able to perform reversal via Fiori Apps Supplier Invoices List. The error Check whether document has already been entered under number XX & & will pop up. The error message is referred exactly to the invoice number that I am going to perform reversal. Does that mean for all Invoice that have Reference info should only reverse via MR8M and not via Fiori Apps? 

[HakanHaslaman]

The error occurs because Fiori App checks the reference field for duplicates, unlike MR8M; invoices with a reference number may need to be reversed using MR8M unless the Fiori app logic is adjusted.