diff --git a/app/controllers/api/v2/registration_commands_controller.rb b/app/controllers/api/v2/registration_commands_controller.rb
index 3497d2d30f6..3fa023dca4d 100644
--- a/app/controllers/api/v2/registration_commands_controller.rb
+++ b/app/controllers/api/v2/registration_commands_controller.rb
@@ -18,8 +18,11 @@ class RegistrationCommandsController < V2::BaseController
         param :insecure, :bool, desc: N_("Enable insecure argument for the initial curl")
         param :packages, String, desc: N_("Packages to install on the host when registered. Can be set by `host_packages` parameter, example: `pkg1 pkg2`")
         param :update_packages, :bool, desc: N_("Update all packages on the host")
+        param :repo, String, desc: N_("DEPRECATED, use the `repo_data` param instead."), deprecated: true
+        param :repo_gpg_key_url, String, desc: N_("DEPRECATED, use the `repo_data` param instead."), deprecated: true
+
         param :repo_data, Array, desc: N_("Array with repository URL and corresponding GPG key URL") do
-          param :repo, String, desc: N_("Repository URL / details, for example for Debian OS family: 'deb http://deb.example.com/ buster 1.0', for Red Hat and SUSE OS family: 'http://yum.theforeman.org/client/latest/el8/x86_64/'")
+          param :repo, String, desc: N_("Repository URL / details, for example, for Debian OS family: 'deb http://deb.example.com/ buster 1.0', for Red Hat and SUSE OS family: 'http://yum.theforeman.org/client/latest/el8/x86_64/'")
           param :repo_gpg_key_url, String, desc: N_("URL of the GPG key for the repository")
         end
       end
@@ -30,6 +33,10 @@ def create
           return
         end
 
+        if params[:repo] || params[:repo_gpg_key_url]
+          Foreman::Deprecation.api_deprecation_warning("Use repo_data parameter instead of repo and repo_gpg_key_url. These will be removed soon.")
+        end
+
         render json: { registration_command: command }
       end
 
diff --git a/app/controllers/api/v2/registration_controller.rb b/app/controllers/api/v2/registration_controller.rb
index 82dfb40568f..c79b58d8456 100644
--- a/app/controllers/api/v2/registration_controller.rb
+++ b/app/controllers/api/v2/registration_controller.rb
@@ -23,13 +23,20 @@ class RegistrationController < V2::BaseController
       param :setup_remote_execution, :bool, desc: N_("Set 'host_registration_remote_execution' parameter for the host. If it is set to true, SSH keys will be installed on the host")
       param :packages, String, desc: N_("Packages to install on the host when registered. Can be set by `host_packages` parameter, example: `pkg1 pkg2`")
       param :update_packages, :bool, desc: N_("Update all packages on the host")
+      param :repo, String, desc: N_("DEPRECATED, use the `repo_data` param instead."), deprecated: true
+      param :repo_gpg_key_url, String, desc: N_("DEPRECATED, use the `repo_data` param instead."), deprecated: true
+
       param :repo_data, Array, desc: N_("Array with repository URL and corresponding GPG key URL") do
-        param :repo, String, desc: N_("Repository URL / details, for example for Debian OS family: 'deb http://deb.example.com/ buster 1.0', for Red Hat OS family: 'http://yum.theforeman.org/client/latest/el8/x86_64/'")
+        param :repo, String, desc: N_("Repository URL / details, for example, for Debian OS family: 'deb http://deb.example.com/ buster 1.0', for Red Hat OS family: 'http://yum.theforeman.org/client/latest/el8/x86_64/'")
         param :repo_gpg_key_url, String, desc: N_("URL of the GPG key for the repository")
       end
       def global
         find_global_registration
 
+        if params[:repo] || params[:repo_gpg_key_url]
+          Foreman::Deprecation.api_deprecation_warning("Use repo_data parameter instead of repo and repo_gpg_key_url. These will be removed soon.")
+        end
+
         unless @provisioning_template
           not_found _('Global Registration Template with name %s defined via default_global_registration_item Setting not found, please configure the existing template name first') % Setting[:default_global_registration_item]
           return
diff --git a/app/controllers/concerns/foreman/controller/registration.rb b/app/controllers/concerns/foreman/controller/registration.rb
index 90f20197a83..0d71e7a15ad 100644
--- a/app/controllers/concerns/foreman/controller/registration.rb
+++ b/app/controllers/concerns/foreman/controller/registration.rb
@@ -18,9 +18,15 @@ def global_registration_vars
     location = Location.authorized(:view_locations).find(params['location_id']) if params['location_id'].present?
     host_group = Hostgroup.authorized(:view_hostgroups).find(params['hostgroup_id']) if params["hostgroup_id"].present?
     operatingsystem = Operatingsystem.authorized(:view_operatingsystems).find(params['operatingsystem_id']) if params["operatingsystem_id"].present?
-    if params["repo_data"].present?
+
+    if params['repo'].present?
       repo_data = {}
-      params['repo_data'].each { |repo| repo_data[repo['repository']] = repo['repo_gpg_key_url'] }
+      repo_data[params['repo']] = params['repo_gpg_key_url'] || ''
+    end
+
+    if params['repo_data'].present?
+      repo_data = {} unless repo_data.present?
+      params['repo_data'].each { |repo| repo_data[repo['repo']] = repo['repo_gpg_key_url'] }
     end
 
     context = {
diff --git a/webpack/assets/javascripts/react_app/routes/RegistrationCommands/RegistrationCommandsPage/index.js b/webpack/assets/javascripts/react_app/routes/RegistrationCommands/RegistrationCommandsPage/index.js
index 3ff06615c0b..27b81b3f410 100644
--- a/webpack/assets/javascripts/react_app/routes/RegistrationCommands/RegistrationCommandsPage/index.js
+++ b/webpack/assets/javascripts/react_app/routes/RegistrationCommands/RegistrationCommandsPage/index.js
@@ -145,7 +145,7 @@ const RegistrationCommandsPage = () => {
       repoDataInternal
         .filter(r => r.repository !== '')
         .map(repo => ({
-          repository: repo.repository,
+          repo: repo.repository,
           repo_gpg_key_url: repo.gpgKeyUrl,
         }))
     );