Dependencies error for Ubuntu 16.04.6 LTS

Hi, We try to install Fred for review features and start to use product. For installation we use link — https://fred.nic.cz/documentation/html/AdminManual/Installation/BinsUbuntu.… (1.2.2). But can't pass step 7. We got dependencies error (see below). fred-webwhois-apache needs *1.17.0-1~xenial+1*, but maximal package that I found on archive.nic.cz is *1.16.1-1~xenial+1*. How to resolve this problem? Sincerely, Lem */root@fred:~# apt install fred-webwhois-apache /*/ / /Reading package lists... Done/ /Building dependency tree / /Reading state information... Done/ /Some packages could not be installed. This may mean that you have/ /requested an impossible situation or if you are using the unstable/ /distribution that some required packages have not yet been created/ /or been moved out of Incoming./ /The following information may help to resolve the situation:/ /The following packages have unmet dependencies:/ / fred-webwhois-apache : Depends: fred-webwhois (= 1.17.0-1~xenial+1) but 1.16.1-1~xenial+1 is to be installed or/ /                                 fred-webwhois-py3 (= 1.17.0-1~xenial+1) but it is not going to be installed/ /E: Unable to correct problems, you have held broken packages./ */root@fred:~# lsb_release -a/* /No LSB modules are available./ /Distributor ID:    Ubuntu/ /Description:    Ubuntu 16.04.6 LTS/ /Release:    16.04/ /Codename:    xenial/