Disciples shouldn’t dump their karma on the spiritual master
A devotee sometimes accepts a sinful person as his disciple, and to counteract the sinful reactions he accepts from the disciple, he has to see a bad dream. Nonetheless, the spiritual master is so kind that in spite of having bad dreams due to the sinful disciple, he accepts this troublesome business for the deliverance of the victims of Kali-yuga. After initiation, therefore, a disciple should be extremely careful not to commit again any sinful act that might cause difficulties for himself and the spiritual master. Before the Deity, before the fire, before the spiritual master and before the Vaisnavas, the honest disciple promises to refrain from all sinful activity. Therefore he must not again commit sinful acts and thus create a troublesome situation.
Srimad Bhagavatam 8.4.15 purport