It can happen that you need to downgrade the AOS kernel in a system. Depending on the build you are going back to, you might get an error message.
Object Server 01: Fatal SQL condition duringlogin. Error message: "The internal time zone version number stored in thedatabase is higher than the version supported by the kernel (4/1). Use a newerMicrosoft Dynamics AX kernel."
You need to change the value for the column value SYSTIMEZONESVERSION in the table SQLSystemVariables. If you look inthe event viewer you can see that it finds the value 4, but expected 1 (4/1).So the solution is to change the value to 1.
Author: Kim Truelsen
Perfectly fixed this problem!!!