It links your deployment to an active GLPI Network subscription. Why Do You Need a GLPI Registration Key?
The registration key is tied specifically to the URL you entered in the GLPI Network portal. If your local instance uses http://localhost or a different internal IP than the registered domain, the validation will fail. 3. Expired Subscriptions glpi registration key
To use the GLPI Marketplace , you need a registration key to link your instance to the GLPI Network It links your deployment to an active GLPI