Identify previous invoices to new invoices through auto-generated invoice transaction number.
Set Auto Generated Numbers of Invoices without changing the previous format.
Example: New format will start at 200000
- Navigate to Setup > Company > Auto Generated Numbers
- On Document Numbers tab, set new format of invoices (set minimum digit as desired).
- Check Update Initial Number then set Initial Number to 200000.
- Note: Do NOT check "Allow Over ride" and "Update"