Also the JAXA press release is highly informative.
https://www.isas.jaxa.jp/en/topics/002636.html
Recent cosmological studies have also shown that the measured value of the Hubble constant--the value that determines how rapidly the Universe expands--changes depending on the distance of the Type Ia supernovae used in the measurement. As more distant supernovae are also older (due to the greater time needed for the light to reach Earth), it has been suggested that the variation could be due to changes in the nature of dark energy, which accelerates the expansion of the Universe, over the Universe's history. But, it may also be an apparent effect stemming from different abundances of the 3C 397-type of Type Ia supernovae in earlier epochs of the Universe [2].
