Old charge off changed 150 day late date 5 years later

[Hgbostonterriers]

Hi all! 
  I'm new to this but I've actively been fixing all my younger year mistakes to my credit. I've been doing really well up until recently. I have a discover card charge off from 2019. Recently out of the blue they changed the date on only the 150 day late to 120 days. No other dates changed. dropped my score 28 points. It doesn't add up? Why? If I dispute it will it poke the bear? Small account that was nearing the point of falling off. Total is less then $700

[CorpCrMgr1]

@Hgbostonterriers a couple of years ago I knew someone that skipped out on a CC. Every month or so the charge was reposted. Every month the credit score dropped. Only after a threat of a law suit the charge went away. Luckily, he had a cousin that was an attorney. One letter and the charge was gone. It was a much smaller CCC. Good luck!