If you are running your weblogic on development environment by default system will Automatically Acquire Lock and Activate Changes.
You can disable “automatically Acquire Lock” option with below steps
Click on Preferences link available on weblogic home page(as shows in screen shot)
Scroll down and uncheck “Automatically Acquire Lock and Activate Changes” option
Click on Save
In change center, you will see your session has lock on weblogic server.
Click on “Release Configuration” button.
Now onward, for making any change, you have to acquire a lock by clicking on “Lock & Edit” button on change center.