Delhi Police — wrongly challan in front of barricading for wrong parking

While i was going office in my car alone (Driving myself), a delhi police officer c. I mr raj kumar stopped me & asked me to park in front of barricading they put in front of dhaula kuan metro station on 14th aug 2020 at 7:30 am.
I parked my car very firmly as per his instructions.
Now he asked me to pay rs. 500 challan for not wearing mask. I asked him although its not logical to wear mask when i am alone driving my car with windows rolled up but if there is such guidelines from government i am ready to pay if he can mention that i was driving my personal car and was alone in my car without mask.
He refused to mention this on challan & started taking pictured of my car number plate when i asked why he mentioned just go. After few minutes i received a sms from delhi trafic police of challan against wrong parking on footpath.
Challan no.[protected]Attached with video of the incident)
Challan date :- 14th aug 2020, 07:45 am