Akhilesh, who took over as the party's national president on January 1 after a bitter split, had convened the meeting of the executive of which both Mulayam and Khan are members.
Mulayam is a member in his capacity as former national president and patron of the party and Khan is a member in his capacity as national general secretary.
Following a bitter feud between the father and the son, Akhilesh had snatched reins of the party from Mulayam Singh and their fight also reached the Election Commission.