Mathias Doumbe has become the first player to leave MK Dons this summer.
The 33-year-old spent four seasons at stadium:mk, making 141 appearances for the club, scoring 11 times.
In the absence of Gary MacKenzie and Antony Kay, Doumbe played at the heart of the defence in the remaining two months of the season, scoring his only goal of the season in the 2-0 win over Swindon in April.
“Mathias has been an excellent servant to this football club and has proven to be a tremendous professional,” said Dons boss Karl Robinson. “He is a strong character who has played a large part in our recent history and it was a hard decision to release him this year.
“However, with the Financial Fair Play regulations becoming even stricter this season we have to be prudent with our recruitment policy and along the way we will have to make tough decisions.
“I would like to thank Mathias for all of his work and dedication to the Club over the past few years and wish him the best of luck in the future. He is someone I class as a friend of mine and he will always be a friend of the club.”
While Doumbe is the first to leave the club this summer, Dons have triggered clauses in the contracts of Jon Otsemobor and Gary MacKenzie, extending their stays for another year.
Ian McLoughlin, Dean Lewington and Adam Chicksen have all been offered contracts but are yet to put pen to paper.