Interface problem "interface in crit (unknown)crit, speed: 1 gbit/s (assumed), in: 0.00 b/s (0%), out: 0.00 b/s (0%)"

For your privacy maybe edit your post and remove the link to your Checkmk server?
If you can no longer edit, @Sara can help you out.

Regarding issue, I assume the interfaces were in use when initially discovered and now no longer in use? If so, any of the following suggested in the link might help you out.