Troubleshooting: Duplicate Invoice no

Question: why can't I save a new invoice? there is a message box prompted Document No. I-00003 is already exist in A/R Invoice.

Version: 1.8 / 1.9 / 2.0

Duplicate inv no1.png

Possible Reason:

Invoice no I-000003 is already exist in system. Thus, system wouldn’t allow duplicate invoice no to be created.


You need to go to change next number to number which has not been used.

Go to General Maintenance > Document Numbering Format Maintenance; click on Category:Sales and select DocType:Invoice to edit. Change the next number that hasn’t been used in system and click on OK to save.

Duplicate inv no2.png

Now, you should be able to save a new invoice into system.

By: Mei 171027, KM 171027, P171103

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