Beadm can't create snapshot

From: Thomas Laus <lausts_at_acm.org>
Date: Wed, 17 Aug 2022 14:35:58 UTC
I attempted to create a ZFS snapshot after upgrading this morning and 
received this error

# beadm create n257443
cannot create 'zroot/ROOT/n257443': 'snapshots_changed' is readonly
#

My version info:

14.0-CURRENT FreeBSD 14.0-CURRENT #9 main-n257443-f7413197245: Wed Aug 
17 08:15:27 EDT 2022

There was not any information in UPDATING about any required ZFS 
configuration changes required nor any ZFS flags that listed 
'snapshots_changed' as something that needed a new value.  There is 
actually a new snapshot created, but 'beadm list' does not show it and 
the boot menu does not have it listed.

Tom

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