deprecation warnings in the interface

I just installed this plugin, which works well but in check_mk I get a warning:

The extension package uses APIs which are deprecated or removed in Checkmk 2.3.0 so that this extension will not work anymore once you upgrade your site to next major version.

It is listing the following:

| Check plug-in uses an API (legacy) which is marked as deprecated in Checkmk 2.3.0 and will be removed in Checkmk 2.4.0. | File: local/share/check_mk/checks/agent_unifi | | Check plug-in uses an API (v1) which is marked as deprecated in Checkmk 2.3.0 and will be removed in Checkmk 2.4.0. | File: local/lib/check_mk/base/plugins/agent_based/unifi.py | | Legacy GUI extension in 'metrics' uses an API (legacy) which is marked as deprecated in Checkmk 2.3.0 and will be removed in Checkmk 2.4.0. | File: local/share/check_mk/web/plugins/metrics/unifi.py | | Legacy GUI extension in 'wato' uses an API which is marked as deprecated and may not work anymore due to unknown imports or objects. | File: local/share/check_mk/web/plugins/wato/datasource-unifi.py |