I can’t remove some dangerous relays from my relay list. Didn’t I do it in the right way or it just can’t be deleted?

Btw, my version is 1.6.1.

nostr:nprofile1qqsr9cvzwc652r4m83d86ykplrnm9dg5gwdvzzn8ameanlvut35wy3g4h5cp7