Create Global Regular expression, to "Return False" in case of:
Create item key:
With zabbix_server 5.0.21 it works fine - (it ignored 2 sources)
With zabbix_server 6.0.2 the agent fails to retrieve the list of all active checks, hence all active checks stops working. Agent log file says:
Attaching agent log with DebugLevel=5 which is linked to 5.0.21 (zabbix.contoso.lan:15051) and 6.0.2 (zabbix.contoso.lan:16051) at the same time.