How to close the prompt

[axin0452]

How to turn off [stepup]enabled
When playing bungee's server, you will be prompted every time you switch the world

[NotTooManyItems]

It's been added in the version for 1.17.1. Both start message and update messages can now be disabled.
Add the two lines under "# Configuration File".
Leave the #'s for backwards compatibility with versions older than 1.13. The config will break if you don't.

# display_start_message=0
# display_update_message=0