Cannot cancel order using python client

anuj_ism
This is the error I am getting:

DEBUG:urllib3.connectionpool:https://api.kite.trade:443 "DELETE /orders/regular/b'181105002237130'?order_id=181105002237130&variety=regular HTTP/1.1" 500

and the exception is this: GeneralException("Couldn't find that `order_id`.",)

But the order_id is correct and there in the system.
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