Renaming one entity renames all (Pesto3)

when i rename one entity then all the other entities also renames!!!!!!

i was trying to make two buttons that have to be pressed on same time to open a door
"- Place one multisource and name it ms.
-Have button1 target the multisource. There's no need to name the button.
Check that the Don't Move flag is checked and set delay before reset to -1.
-Type in the name of the multisource (ms) in the master property field of button2. No need to name this button.
Like button1, check Don't Move and also check the Toggle flag.
Have button2 target the door."

the values of the entities keep changing every time i edit one and another.