How can I keep the session name fixed in iterm2 tab created by applescript?

I have been using iterm2 and I created an applescript to automate the process of opening some tabs I need to work in my project. I opens a few tabs, moves to directories, run a few statements (git pull, npm install, etc..) and set the session name (tab name). See the example:

#!/usr/bin/osascript
tell application "iTerm2"

  tell current window
    create tab with default profile
    set backendTab to current session
  end tell

  tell backendTab
    write text "cd /Users/felipe/projects/backend && git pull && npm install"
    write text "clear"
    set name to "backend"
  end tell
end tell

And I call it from a function in my ~/.zshrc

function dev() {
  osascript dev.scpt
}

It works, but the problem is when I run any command in these tabs such as npm start to run my app, it changes the tab name. If I right click on the tab, I can see the session name set, and a unlocked icon next to it: If I click on it, it switches to locked, which provides the behaviour I want, by prefixing the session name in the tab title. **Question**: How can I set this lock via applescript? Thank you!