RB2011UAS downgrade from 6.0.beta14 to 5.26 fails.

Hello everyone.
Be aware:
RB2011UAS. Downgrade from pre-installed 6.0.beta14 to 5.26 will fail the router.
Next step will be - netinstall.

New revision (with beeper and power jack on the back) don´t support ROS 5.X

I see.
Thanks for info , Didn’t realize that .