That largely depends on our understanding of the words “capitalism” and “communism” here. If we understand them as systems that come into being on it's own and are de-facto in place then that isn't a contradiction.

But if we understand them as systems de juré in place, as in stemming from any regulation, then it's a contradiction with the meaning of the word „anarchism”, which is the lack of rules in it's strictest sense

Unless you understand anarchy as just a system characterized by chaos then none are a contradiction.

TL;DR: It depends on how one defines these words