use redirect instead of render to avoid creating keys when refresh - resolves #47942

app/controllers/projects/settings/repository_controller.rb

@@ -12,10 +12,10 @@ module Projects
         @new_deploy_token = DeployTokens::CreateService.new(@project, current_user, deploy_token_params).execute
 
         if @new_deploy_token.persisted?
-          flash.now[:notice] = s_('DeployTokens|Your new project deploy token has been created.')
+          flash[:notice] = s_('DeployTokens|Your new project deploy token has been created.')
         end
 
-        render_show
+        redirect_to action: :show
       end
 
       private