Does anyone have access to the original article? It’s paywalled and scihub doesn’t seem to have it yet.
Apparently the difference in age comes from a hypothesis that fundamental cosmological constants aren’t really constant, but more akin to parameters that change over time. But I can’t seem to find any recent experiments or observations that even slightly back this up. And I’d be really interested to read more about this.
Although I remember the Hubble constant having slightly different non-overlapping values when calculated using two different methods with a high enough certainty. So constants being parameters is kinda a plausible hypothesis.