Switch from Telnet to SSH

[SD31]

Hi,
I would like to connect to PuttY in SSH instead of Telnet on the switches.

For that on IMC I created a template that I added to a switch but once in the plan list this one remains in inconsistent (at the SSH level).

I tried changing the login type ( which was in telnet) to ssh, but it still doesn't want to take the template into account.
When I click on "test" it also gives me a failure message.

Do you have any idea?

Thank you in advance.