remnants after major upgrade

Hello arm@,

After source upgrading from 13.1-p2 to 14-current, I notice the following in zfs list

# zfs list
NAME                                        USED  AVAIL  REFER  MOUNTPOINT
zroot                                      64.2G  1.68T    96K  /zroot
zroot/ROOT                                 13.2G  1.68T    96K  none
zroot/ROOT/13.1-RELEASE_2022-08-31_153934     8K  1.68T   750M  /
zroot/ROOT/default                         13.2G  1.68T  12.7G  /

there's no beadm installed - it's a plain almost default installation.
Should I delete the zroot/ROOT/13.1-RELEASE_2022-08-31_153934 ?

TIA,
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