I was looking at how COVID19 vaccine VAERS data changed overtime and used the Wayback Machine, and noticed that deaths were reported 12,313 just a few day ago.

Today, the number was halved to 6,207. How can this number go down? The CDC states they do not publish amended VAERS reports to the public.

https://web.archive.org/web/20210721131024/https://www.cdc.gov/coronavirus/2019-ncov/vaccines/safety/adverse-events.html