Wale is not happy that a guest verse of his, which was supposed to be featured on R. Kelly’s new album, was unceremoniously removed, and the rapper is taking out his frustration on pop super-producer Lukasz “Dr. Luke” Gottwald.

The song in question is “Marching Band,” a new track from Kelly’s upcoming The Buffet album, which arrived earlier this week and features Juicy J. Apparently Wale was supposed to serve as a second featured guest, but got dumped from the track.

“Hey @TheDoctorLuke thanks for taking me off that Rkelly song.. I guess I'm not good enough to be on your record. I'll keep trying,” Wale posted on Twitter. Dr. Luke co-produced the song alongside Cirkut and Kelly.

When asked by a fan on Twitter if “Marching Band” was the song being referenced, Wale responded, “Yeah .. I got the verse still I may just make it a whole new song .. Dr Luke must think I'm not worthy enough.”

The Twitter exchange comes a few weeks after Wale’s beef with fellow Maybach Music Group rapper Meek Mill re-heated, and then re-settled down. Dr. Luke, meanwhile, is still engaged in an ugly legal battle with Kesha.