Duplicate invoces

[PDJ]

Hi all,

 

For some reason my whmcs is creating two invoices when domain names are due for renewal.

 

For example one of my customers has a domain name that is due on the 29/04/2020

 

The system created the first invoice on the 30/03/2020 with a due date on the 29/04/2020

One week later the system created another invoice with date 07/04/2020, with a due date in the past 30/03/2020

 

The customer paid the second invoice and the domain was successfully renewed with the registrar however the first invoice is on their account outstanding.

 

Any ideas?

 

Thanks