Error 323 usually occurs for the following reasons:
You have two accounts with the same account name and account number (or at least the same last 4 digits). In this case, if possible, re-name one of the accounts at the bank's website to uniquely identify the account. Then, try adding the accounts again in our product.
You added the same account twice in our product. You can disconnect the most recent instance of the accounts (lowest on the list on the Bank Accounts page). Please note, deleting accounts does delete the data imported from them, so make sure the account you are deleting is the most recent one to avoid losing older data.
If neither of the above solutions works, please contact our support team.