Why will CSK and MI face each other only once in IPL 2024 league stage?

CSK and MI will face each other once in IPL 2024 league stage. Each team will play four teams from their own group twice, four teams from other group once and one team from other group twice, making it 14 matches/team. Group B comprises CSK, SRH, RCB, PBKS and GT, while Group A comprises KKR, RR, DC, LSG and MI.