Students in a class at the University of Colorado at Boulder gave up a planned rally to support protests of institutional racism at the University of Missouri after a black student group at Colorado spoke out against it, The Daily Camera reports. Members of the class “Whiteness Studies,” which examines racial inequality, were to hold the rally on Friday afternoon but canceled it when members of the Black Student Alliance complained about not being consulted.

“We acknowledge that we should have contacted (the group) to see what they were already planning with regard to Mizzou,” wrote Azabe Kassa, an organizer of the rally, in an apology on Facebook. “While we understand that this does not excuse our actions, we learned a lesson in proper allyship.”