That link points to 8.0.20 not 8.0.2 ... it would less egregious if running 8.0.26 since at least you would have been running the most up-to-date version of the 8.0 major release series but even that is over 7 years old at this point.
8.2[.x] is a completely different major version.
Upgrading 8.0 to a late 9 series or current 10 release will be non-trivial but, IMO, the decision not to should be a done with the consent and understanding of whomever ultimately owns the database and not through inattention.
