You can achieve it via `Automation Rules​

1. first install the module `Automation Rules` via app menu (don't forget to remove `app` filter)
2. go to menu setting => Technical => Automation Rules
3. if you don't see `Technical` button, you can activate developer mode first by scroll down and click `Activate the developer mode`
4. create new record, and add this code​

exist = model.search([
    ('name', '=', record.name),
    ('id', '!=', record.id),
])
if exist:
    raise UserError('The attribute name already used!')

Hello

I have followed all steps from setting page-->Technical option--->Automation Rules

After clicking on Automation Rules received message like "Connection lost. Trying to reconnect"

after few seconds message received like this "Connection Restored. You are back online"

Same Message appearing after clicking on setting page-->Technical option--->Automation Rules button

please let me know what is the exact issue?

thanks