The invoice sequence will update on validate the invoice (while validate the invoice Journal Entry will post and Journal Entry sequence number will update into the current invoice)

While cancel the Invoice Journal Entry will be deleted, after Re-validate the Invoice Next number will update.

Customization is required on Journal Entry creation.

Hello Edser,

thank you for your reply. I tried to set it both way Implementation: Standard and no gap. The problem is not solved. I have account cancel installed to cancel the invoice.

Thanks

MAX

Hello Max,

Try changing the sequence implementation to No Gap. It's weird how it's behaving because even on Standard I don't have that issue and as you're only testing Odoo I guess there's no one else but you giving input to the system but give it a try.