Contradiction with James 1:6
This verse emphasizes the necessity of asking in faith without wavering, which seems similar rather than contradictory to having faith in God as Mark 11:22 suggests.
James 1:6: But let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea driven with the wind and tossed.
Contradiction with Matthew 21:21
Similar to Mark 11:22, it encourages faith and doubting-not, so it doesn't contradict the idea presented in Mark 11:22.
Matthew 21:21: Jesus answered and said unto them, Verily I say unto you, If ye have faith, and doubt not, ye shall not only do this [which is done] to the fig tree, but also if ye shall say unto this mountain, Be thou removed, and be thou cast into the sea; it shall be done.
Contradiction with Luke 17:6
This verse also supports the concept that faith, even as small as a mustard seed, can achieve great things, aligning with rather than contradicting Mark 11:22.
Luke 17:6: And the Lord said, If ye had faith as a grain of mustard seed, ye might say unto this sycamine tree, Be thou plucked up by the root, and be thou planted in the sea; and it should obey you.