error in gl ES 3.8.2 automatically update to…

error in gl_ES , 3.8.2 automatically update to 3.9 RCRelease Candidate A beta version of software with the potential to be a final product, which is ready to release unless significant bugs emerge.
and set sites as BETABeta A pre-release of software that is given out to a large group of users to trial under real conditions. Beta versions have gone through alpha testing in-house and are generally fairly close in look, feel and function to the final product; however, design changes often occur as part of the process. TESTERS: This site is set up to install updates of future beta versions automatically.
how to downgrade?