There are many Jazz standards where a II V I progression is followed by another II V I progression in a key whose I chord is a tone (major 2nd) lower. In this situation, chord IMaj7 of the first key becomes chord II min7 of the next key. This means that all you have to do to play the new II V I is change chord I from a Major 7th to a minor 7th by lowering the 3rd and 7th degrees a semitone. Here is an example.