issue is regarding version 1.5.9.
Today i had one recurring invoice planned and I saw that two invoices were generated with the same invoicenumber (15381). In the invoicegroup i see that the next invoicenumber is 15383. (see attached images)
To fix this issue i have to delete the duplicate and correct the next invoicenumber in the default group.
Last month i had the same issue but i thought that it might have been an incident. Today however it is the same again and with a different customer.
Can someone shed some light on this problem?
Any help would be appreciated.