It could be that it was overcrowded where they were and a bed opened somewhere else. It could have been for disciplinary reasons. Most times you never find out why, but you have to just role with it as you are the property of the state until your release date.
https://www.inmateaid.com/ask-the-inmate/why-would-they-transfer-someone-if-they-are-on-probation-and-waiting-for-a-bed#answer
Accepted Answer Date Created: March 11,2016