Experimental observations claimed as evidence of a fifth fundamental force

Courtesy of the Daily Grail - here's an article at sciencealert.com, reporting that a group of researchers in Hungary have made observations in two separate experiments that are claimed to be consistent with a new fundamental force of physics mediated by a new elementary particle - a boson with a mass of around 17 megaelectronvolts:
https://www.sciencealert.com/physicists-...-of-nature

The article comments:
In fact, a number of dark matter experiments have been keeping an eye out for a 17 megavolt oddball particle. So far they've found nothing, but with plenty of room left to explore, it's too early to rule anything out.
Rearranging the Standard Model of known forces and their particles to make room for a new member of the family would be a massive shift, and not a change to make lightly.