diff --git a/app/controllers/concerns/bbb_helper.rb b/app/controllers/concerns/bbb_helper.rb
index c21ec3f7..1323f9cd 100644
--- a/app/controllers/concerns/bbb_helper.rb
+++ b/app/controllers/concerns/bbb_helper.rb
@@ -293,7 +293,7 @@ def add_ext_params(action, options)
     @chosen_room.settings['ext_params']&.[](action)&.each do |key, value|
       # the value in ext_params from the tenant settings is the name that should be passed to BBB
       bbb_name = ext_params&.[](action)&.[](key)
-      options["userdata-#{bbb_name}"] = value if bbb_name
+      options[bbb_name] = value if bbb_name
     end
   end
 end
diff --git a/app/controllers/rooms_controller.rb b/app/controllers/rooms_controller.rb
index 65a039c3..7eadc2ae 100644
--- a/app/controllers/rooms_controller.rb
+++ b/app/controllers/rooms_controller.rb
@@ -529,6 +529,8 @@ def set_ext_params
     broker_ext_params = tenant_setting(tenant, 'ext_params')
     lms_custom_params = launch_request_params['message']['custom_params']
 
+    logger.debug("[Rooms\'s Controller] extra params from broker: #{broker_ext_params} \n custom params from lms: #{lms_custom_params}")
+
     pass_on_join_params = lms_custom_params.select { |k, _| broker_ext_params&.[]('join')&.key?(k) }
     pass_on_create_params = lms_custom_params.select { |k, _| broker_ext_params&.[]('create')&.key?(k) }