Duplicate Transaction Number happen when users creates a same transaction (e.g. Cash Sale), with the Duplicate Number Warnings user preference is set to No Warnings or Warn but the user had previously marked and saved the Do not Show This Warning Again checkbox on Duplicate Number warning message page.
- Administrator Role: Navigate to Setup > Accounting > Accounting Preferences
- Click Items/Transactions
- Duplicate Number Warnings: Select Warn
- Click Save
- Administrator role: Navigate to Setup > Company > General Preferences
- Click Overriding Preferences
- Allow Override: Remove Checkmark for Duplicate Number Warnings
- Click Save