Mumbai Traffic Police — wrong challan issued to bike with same registration number for my car

Address:

400095

My maruti ertiga car registration number is mh47k4963, on viewing challans for my vehicle found one challan mumcm[protected] on 17 february 2019, however on seeing the photo for this challan found out that it was issued for a red & grey bike with the same registration number of my car. There are two challans on this registration number and one is for the bike and one for my car which is mtpchm[protected] dated 29 jan 2019. How can a bike and car have same registration number from the rto.