This may happen when an Auto Bank Reconciliation has matched the transaction to a statement entry of a similar amount. Check the Bank Reconciliation Statements section in Financials:
Click Financials, then click Cash Book.
Select the Nominal Bank Account.
Click Bank Rec, then click View Statements.
Select the desired Bank Statement.
On the Reconciled Statement Transactions section, look for an entry matching the value of the nominal transaction you are expecting to see on the Cashbook Transactions side.
Once located, click the three-dot menu, then click View Reconciled Transactions. This shows the cashbook transactions matched against the statement entry.
Click Undo to undo the match.
Match the Cashbook Transaction against your desired statement entry.
If you see an error when clicking Undo, contact the support team to investigate and provide the following details. If you have trouble reaching us, see Get support in Access Financials:
Details of the Nominal Ledger Transaction(s), such as Transaction Amount, Date, Origin (Sales or Purchase Ledger)
Bank Account Nominal Code
Bank Statement Reference