Duplicate post. See here for thread: [URL]#M43001
I've configured my single-tier MLAG switches (2 n4032s 1 n2048p) using port-channel 2 and when I configure the interfaces on partner switch (2048) I get a warning message on the console. "WARN Interface Te1/0/2 partner priority 1 is not same as existing members of LAG interface Po2 (1). Not adding interface Te1/0/2 as active member of LAG interface Po2."  
MLAG partner switch warning