Please check the steps to replicate are:
From the Toolbar, click Sales Ledger, Sales Postings.
Click RMB and select CSV Remittance Import.
Locate the file.
Click Apply.
On the batch, click RMB and select Add Items To Batch. The import fails and the first account is incorrect.
The issue is the result of the account in question not being cleared from the tables, the system is going in a loop when you try to import.
To remove the offending account from the tables Support will need to run some scripts on the database. Therefore please contact us reference the title of this article and please include details of the import, or even attach the import file.