UAE work visa?

Hello i have received a job offer in dubai and my employer has already started my visa procedures. Recently i got a better offer and i want to take it . I was thinking to ask my current employer to cancel my visa so as i can move to the other job . I was wondering cancelling a new work visa would have any consequences on my next work visa when is being done ? Confused about the legal impact of work visa. I have not moved to dubai yet and i do want to take the right decision . Pls advise !