Doesn't seem like a rewriting of history, but Sonic Mayhem is treated in some cases as the name of a band led by Sascha, in others as the stage name of Sascha alone. There's a fair bit of confusion.
From Sascha's own word
, David worked with him for the first 4 years before leaving for other projects and then Sascha was the only member of SM. 4 years out of a 22 years career makes it probably people simply forgot the old stuff.
Relate this to Marylin Manson, whose name refers both to the band and to the band's frontman.