Please help with the following error.

The invoice cannot be modified or deleted. This error was created when working through the settings and journal for cash basis accounting. A number of invoices are throwing this error and cannot be modified or deleted in the invoice (which will not open), the invoice list or where present in the journal.

"User Error

An error has occurred. The move (INV 17177) is not balanced. The total of debits equals $ 220.00 and the total of credits equals $ 200.00. You might want to specify a default account on journal "Customer Invoices" to automatically balance each move."

Thank you