Disable "Upcoming Alarm" Notification (without disabling alarm)

I'm fairly new to the Android platform so hopefully this is a silly question, but since I've had my Pixel (Pixel 1, Android 8.0.0), it's been giving me notifications for alarms I set in the Clock app two hours prior to their occurrence (disregard actual time in the screenshot). Note that I _do not want to delete the alarm_, just this notification about it. . I know this isn't a *huge* issue, but it's just more annoying notification clutter that I don't want. What's weird is, I've apparently found the settings to change this behavior - but the toggle is disabled and I can't modify it. Is there another way to do this that I'm missing, or a way to enable that toggle?