Checkmk Agent Not Listening on 6556 After Reinstalling Agent v2.1.0

I had to rebuild my checkmk instance.

Annoying:

Registered agent:

Status checked. Still connected to the old instance.

cmk-agent-ctl status
WARN [rustls::conn] Sending fatal alert BadCertificate
Version: 2.2.0b2
Agent socket: operational
IP allowlist: any


Connection: watch.sec.httg/hlwatch
	UUID: 61e46165-97cd-4fef-b51e-c1cf79e6d785
	Local:
		Connection mode: pull-agent
		Connecting to receiver port: 8000
		Certificate issuer: Site 'hlwatch' agent signing CA
		Certificate validity: Thu, 20 Apr 2023 08:09:14 +0000 - Thu, 20 Apr 2028 08:09:14 +0000

Connection deleted.

 cmk-agent-ctl delete 61e46165-97cd-4fef-b51e-c1cf79e6d785
Deleted pull connection 'watch.sec.httg/hlwatch'
OK [hlsshD ~]# cmk-agent-ctl status
Version: 2.2.0b2
Agent socket: operational
IP allowlist: any
No connections

Port disabled. Why does this happen? Reinstallation does not help.

[hlsshD ~]# telnet 192.168.20.50 6556
Trying 192.168.20.50...
telnet: Unable to connect to remote host: Connection refused
Error [hlsshD ~]# ss -tulpn | grep 6556 
Error [hlsshD ~]# 

i am not happy about this.