Mumbai Traffic Police — Mumcm[protected]

My name is Ranjith, working in bank of India walkeshwar branch, my bike no. MH01DU0681 as there is no parking at our branch premises we usually park at nearby residential apartment, yesterday I was charged 1500 rs for no parking under the sec 122/177 mva and my colleagues were charged 500rs only under the same section, on june 2nd also I was charged only 500rs for same no parking under the same section.
Why is this difference in amount for same section
So please update my challan to 500rs