Unable to delete only 1 line of audio at a time( PLEASE HELP!)

So today I was editing a song that I was making and I dont know if I pressed on something, but when I tried to delete only 1 line of audio, all the other ones deleted. If you look at the picture below, a timer watermark filled in all the other lines of audio even though I was only highlighting one. Someone please help

You have accidentally turned on “Sync Lock”. You need to turn it off (bottom of the “Tracks” menu).
More info: https://manual.audacityteam.org/man/sync_locked_track_groups.html