Snapshots I can't delete - why?

[drudge]

I have these two snapshots that I didn’t set up and can’t delete - see image below. What are they for? Do I still need them, if not how do I get rid of them?

Note - “nvme” is the pool I use for both apps and containers. Am running TrueNAS 25.10.3 having incrementally upgraded over time from 25.04.I’m wondering if they got created for some reason when I previously upgraded.

[pmh]

There are clones depending on these snapshots, i.e. live data you are using. The error message in the lower right corner tells exactly that.