You can see in Reports > Transfer Reports -view if there are multiple Reference Data Imports -reports with the same date. There should be only one report per bank account per day. In most cases, extra payments can be found in the accounts receivable's Payments - Incomplete view with the comment "Processed earlier." Duplicate payments may also be in the Completed view.
Check the Payments > Completed view to see if any invoices have been processed multiple times on the same date. If so:
a) If there are not many invoices, you can
- Remove all duplicated payments
2. In the section Settings > Counters > Payments modify the next invoice number based on the last number of the previous day
3. Create manual payments for invoices based on the data from transfer reports.
b) If there are many invoices, you can remove extra payments so that each invoice has only one payment in the Completed status. Please note that this will leave gaps in the numbering of payments.
Payments > Incomplete In the view, payments with the description "Processed earlier" can be deleted.