6:49 AM PT -- 8/25 -- A rep for Quality Control tells TMZ ... "Not only are the accusations in this lawsuit false, they are totally detached from reality. Offset remains a part of QC. Back to business."
While Migos continues dodging break-up rumors, Offset's going to war with the group's record label ... filing a lawsuit over his solo career.
Offset filed docs, which TMZ Hip Hop obtained, and in them he accuses Quality Control Records of ignoring a deal they made back in January 2021.
According to the suit, filed Tuesday, Offset says he negotiated his solo deal, and "paid handsomely" for his artist rights ... but now that he's dropped a new solo project, he says QC isn't honoring the deal.
He just released the Baby Keem-produced solo single, "54321" … which he says QC incorrectly tried to claim as its own, an action he calls "hostile."
Offset also plans on releasing another song entitled "Code" with Moneybagg Yo this Friday, presumably just on Motown Records, the label he signed with for his solo career.
Migos sparked break-up rumors earlier this year when Quavo and Takeoff began releasing music under the moniker "Unc & Phew." Quavo was willing to talk about everything -- except the alleged split.
Offset's Migos deal with QC remains in place -- but when it comes to his solo work, he wants the court to declare QC does NOT own anything he's made since January 15, 2021, or in the future.