Hi Amy!
Thanks for reaching out to us! I’d be happy to help with this topic.
Unfortunately, there is no built-in way to reset the total tickets sold.
By default, the Total Tickets Sold for an event will always count how many tickets where sold regardless of their status. This allows you to know many ticket sales were really made and compare that with the number of cancelled or deleted tickets.
If you want to reset the Total Tickets Sold, you will need to delete the ticket and create a new one.
I’d suggest to setup a dev/staging site so you can test things out without disrupting the live site.
I hope that helps. Let me know if you have any follow up questions.
Best,
Victor