Good Day

Sorry I hope this is not a super silly question (I am not a professional bookkeeper)

I needed to reverse a journal entry because the amount was processed with VAT.

I used the exact same reference (ELEC07/21) and under description used "Reversal"

I now need to process the exact same charge without VAT.

Can I use the same reference or do I need a new reference?

eg: ELEC07/21 (electricity July 2021), as the charge is for electricity usage during the July month.

Thanks in advance