Copy of ERP Customers have missing down payment

Some Customers that have missing down payment on the payment schedule as the screenshot below.

This is caused by duplicate payments recorded against the customer.

Solution is to Unlink duplicate installation and the Reset the scheduled payments.

1. In the ERP.
2. Go to "CRM"
3. Then"Bboxx Customers"
4. Search for and open the customer.
5. Confirm the schedule is wrong. There should be a first scheduled payment with amount = 0
6. If confirmed then click the "Installation details" tab.
7. Then click the link in the "First Installation" field.
8. Check the installation has no "Products" linked otherwise stop.
9. If the "Products" list is empty click "More"
10. Then click "delete"
11. Go back to the "Bboxx Customers" view.
12. Search for and open the customer again.
13. Then "Admin Actions" tab.
14. Then click the "Reset Scheduled Payments" button.
15. Check the schedule has been fixed. There should not be a first scheduled payment with amount = 0