This is done because printer device URIs sometimes contain sensitive authentication information that should not be generally known on the system.
There is no way to disable this security feature.
<dl class="man">
+<dt><a name="CreateSelfSignedCerts"></a><b>CreateSelfSignedCerts yes</b>
+<dd style="margin-left: 5.0em"><dt><b>CreateSelfSignedCerts no</b>
+<dd style="margin-left: 5.0em">Specifies whether the scheduler automatically creates self-signed certificates for client connections using TLS.
+The default is yes.
<dt><a name="DataDir"></a><b>DataDir </b><i>path</i>
<dd style="margin-left: 5.0em">Specifies the directory where data files can be found.
The default is usually "/usr/share/cups".