diff --git a/README.md b/README.md
index 770655c0..70479317 100644
--- a/README.md
+++ b/README.md
@@ -719,7 +719,7 @@ A version from before v3.0.0 has no worker: `systemctl disable --now webvirt-wor
 
 ### Moving to a new machine
 
-A [backup](#backups) moves the panel to a new machine, or back onto lost volumes: the database, the secret key (signed-in users stay signed in), the worker's id and the SSH keys and TLS certificates the computes accept. Install the panel there first, the same version or a newer one, then copy the backup directory over and set `b` to it. The backup does not hold `docker-compose.override.yml`, the nginx config or `/etc/default/webvirtcloud`: bring your own lines over yourself. Users sign in with their passwords from the backup; the new installation's `data/admin_password` no longer applies.
+A [backup](#backups) moves the panel to a new machine, or back onto lost volumes: the database, the secret key (signed-in users stay signed in), the worker's id and the SSH keys and TLS certificates the computes accept. Install the panel there first, the same version or a newer one, then copy the backup directory over and set `b` to it. The backup does not hold `docker-compose.override.yml`, the nginx config or `/etc/default/webvirtcloud`: bring your own lines over yourself. Users sign in with their passwords from the backup; the new installation's `data/admin_password` no longer applies. A `SECRET_KEY` set in the compose file has no `secret_key` in the backup: set the same value on the new machine. With PostgreSQL, stop the old panel before the new one starts: both would run the jobs of the one database.
 
 Docker, in the directory you installed from:
 
@@ -728,7 +728,7 @@ b=../webvirtcloud-backup-YYYYMMDD-HHMMSS &&
 docker compose stop -t 95 &&
 docker compose run --rm --no-deps -T --entrypoint /srv/webvirtcloud/venv/bin/python3 webvirtcloud \
   -c "import os,sqlite3,sys,tempfile; t=tempfile.mktemp(); open(t,'wb').write(sys.stdin.buffer.read()); [os.remove(p) for p in ('data/db.sqlite3-journal','data/db.sqlite3-wal','data/db.sqlite3-shm') if os.path.exists(p)]; sqlite3.connect(t).backup(sqlite3.connect('data/db.sqlite3'))" < "$b/db.sqlite3" &&
-docker compose cp "$b/secret_key" webvirtcloud:/srv/webvirtcloud/data/ &&
+{ [ ! -f "$b/secret_key" ] || docker compose cp "$b/secret_key" webvirtcloud:/srv/webvirtcloud/data/; } &&
 docker compose cp "$b/node_id" webvirtcloud:/srv/webvirtcloud/data/ &&
 { [ ! -d "$b/ssh" ] || docker compose cp "$b/ssh/." webvirtcloud:/var/www/.ssh/; } &&
 { [ ! -d "$b/pki" ] || docker compose cp "$b/pki/." webvirtcloud:/var/www/.pki/; } &&