Not just you, but a lot of other users also recieved that same notification from their telegram notification bot, like a very close friend of mine also reached out to me over the night to complain that he's forum positive karma was just wipped out, and the forum was unaccessible to him, I honestly was surprised, but asked him to calm down, that the forum was possibly down for maintainance, that this morning, we would check what happened, luckily, we I logged in this morning, I discovered that his positive Karma was intact, so possibly, the notification was as a result of a bug, which must have emanated on some accounts as the site was being updated or upgraded.
And I don't think it's a bug from the telegram bot, since I didn't receive such notification, so, it's possibly a forum bug that briefly affects some accounts.
Happy everything was back to normal quick enough.
EDIT = ok, I just read PX-Z reply above mine, it was a telegram issue, not the forum, but I wonder why I also did not get the same negative Karma notification, if it was a telegram issue, wasn't it supposed to be a general notification?