Migrate from airtime to LibreTime 4

Describe the problem

We have airtime working on a server. We’re trying to migrate this airtime to another server with LibreTime 4.
We have followed:

Expected behavior
We expect that once the migration is done, Libretime interface allows login with users defined in airtime interface and we can see all our airtime organization in Libretime interface.

LibreTime version

Installation method and OS / Environment
Installed with the installer

Operating system: Debian 11
Method: Installer script