Why extinguishing of 'diya' on Bhai Dooj is considered inauspicious?

Extinguishing of 'diya' on Bhai Dooj is considered inauspicious, as it symbolises that the gods and goddesses are not pleased with the person who lit the 'diya', or she didn't perform prayers with full devotion. According to astrology, it could also mean that a person's wishes are being hindered or that they are under the influence of negative energy.