In 1991-92 there were two bands using the name TSA - one led by Machel, Kraszewski and Niekrasz, and the other by Nowak and Piekarczyk; the former was forced to use the name TSA Evolution. In 1999 Nowak and Piekarczyk were legally forced by the former members of the band to use the name TSA '99, but eventually Piekarczyk, Machel, Kap³on, Niekrasz and Nowak reunited and signed an agreement, that from now on this lineup is the only lineup that can use the name TSA.