puppetlabs-ntp : can't override NTP servers from module

Hi,

We are using puppetlabs-ntp version 7.1.1.

Recently we faced, that NTP servers from our Hiera does not override setting, which comes from the module, but get merged with them.

Is it an easy way to change that behavior?

i.e. we do not want to use default NTP servers, defined in the module at all, but just our NTP servers, defined in our hiera file.