Shah Khalil Allah moved to Yazd in 1815, probably out of concern for his Indian followers, who used to travel to Persia to see their Imam and for whom Yazd was a much closer and safer destination than Kahak.
Shah Khalil Allah's relocation to Yazd in 1815 was motivated by the safety of his Indian followers, who frequently traveled to Persia to see their Imam. Yazd offered a more convenient and secure location than Kahak for these travelers.