XF 2.1 welcom private message issue


i notice that my welcome message is disabled, i like to send just an email to newe user, not private message:

Annotazione 2020-05-29 105601.jpg

BUT, i see that new user continue to receive a new Welcome private message with a few text that i've inserted before in the beginning.
I try to search in phrases and language, i can't find that words in private messages.
And my option is already disabled, so, how can they continue to receive the welcome message?