Scenario:
Solution:
as from the Error Message we can understand that this transaction had been knock off.
Step 1 - Click "Customer/Supplier" > Click "Customer Knock off/Supplier Knock Off"
Step 2 - System will prompt out "Customer Knock off" feature, please untick both "Show Outstanding Only"
Step 3 - in this Case, we able to find all transaction which already fully knock off, then we can untick the matching and Save.
Step 4 - Now we can amend Journal Entries without error.
Another Solution.
Click Maintenance > Click System Option > Tick and Save with "Allow Modify After Knock Off"
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