Class parameters in a module (e.g. puppetlabs/ntp 6.0.0) should not have the override flag set on class import when the module uses data lookups.

In these cases, no inline default is given in the manifest (class foo($a, $b, $c) {), but the default is derived from the data within the module. Traditionally, prior to data binding this would have meant that the parameter is required, but this isn't a correct assumption any more.

(Workaround, use the Override all parameters/Set parameters to defaults pair of options on the dropdown menu on the Puppet classes page to set them to defaults.)