The Salt Master has rejected this minion's public key!

SUSE Manager 4.3

Client server "minion" fails to bootstrap against the SUMA server again. In other words, this client was already registered to SUSE Manager. 

Error reported in /var/log/salt/minion or systemctl status salt-minion / systemctl status venv-salt-minion :

2025-04-13 09:58:36,678 [salt.utils.parsers:1084][WARNING ][2401] Minion received a SIGTERM. Exiting.
2025-04-13 09:58:41,890 [salt.crypt       :791 ][CRITICAL][128935] The Salt Master has rejected this minion's public key!
To repair this issue, delete the public key for this minion on the Salt Master and restart this minion.
Or restart the Salt Master in open mode to clean out the keys. The Salt Minion will now exit.

Please remove the salt-key from the SUMA server: 

# salt-key -d MINIONID

Next, remove the public key from the client server and restart the salt.minion/salt-bundle service:

(salt-bundle)
# rm -rf /etc/venv-salt-minion/pki/minion/master_minion.pub
# systemctl restart venv-salt-minion

(salt-minion)
# rm -rf /etc/salt/pki/minion/master_minion.pub
# systemctl restart salt-minion

Then accept the salt-key from the SUMA server:

# salt-key -a MINIONID
# salt-key -L | grep -i MINIONID

SUMA server still has the old minion key cached from the client server. When the client server tries to reconnect, the Salt Master detects a key mismatch and rejects the connection.

Alternatively, please deregister the client server and bootstrap it again: 

https://www.suse.com/support/kb/doc/?id=000018170