|Component||Checks & Agents|
|Title||Drop support for creation of HostLabels via discovery function|
|Checkmk Edition||Checkmk Raw Edition (CRE)|
|Compatibility||Incompatible - Manual interaction might be required|
This werk only affect users who implemented their own plugins *and* where creating HostLabels using the discovery function.
Plugins trying to create HostLabel instances will fail with a NameError.
The afore mentioned feature is no longer supported. Creation of host labels can now only be implemented using the new check API. It is done by passing a `host_label_function` to the `register.agent_section` function. For details please refer to the dokumentation.