Deseret had to change its practice.
The Latter-day Saints did not like their territorial status. Church leaders and the territorial legislature contiunously pushed for statehood.
Delegates met in 1856, wrote a Constitution and proposed the state of Deseret. Congress did not agree.
In 1872 a constitutional convention drew up a new Constitution, dropping the Deseret name from their petition. When that failed, the state of Deseret ended.
Thank you for that historical perspective. BTW, they didn’t have to do anything. They chose to do it.