I accidently made a invoice twice with same serial number one 04 another 004
I was able to make e-way bill without any issue so it didn’t caught my attention. The invoices are months apart and I have already issued a credit note on behalf of the recent one. Kindly let me know what necessary steps to I need to take now? How do I rectify this as one invoice was generated in May another in October. I am a small business proprietor.
Urgent? 
Please start by indicating Manager’s version and edition, and the OS it’s running on.
If you cannot simply delete the 2nd invoice due to tax obligations, then I would create a credit note.
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Pretty urgent to me… 
I have already created the credit note for it. So I am assuming It should suffice.