diff --git a/app/Http/Controllers/Api/ServicesController.php b/app/Http/Controllers/Api/ServicesController.php
index ddd63d60c..cfe96edbe 100644
--- a/app/Http/Controllers/Api/ServicesController.php
+++ b/app/Http/Controllers/Api/ServicesController.php
@@ -68,7 +68,7 @@ private function applyServiceUrls(Service $service, array $urlsArray, string $te
 
         $duplicates = $urls->duplicates()->unique()->values();
         if ($duplicates->isNotEmpty() && ! $forceDomainOverride) {
-            $errors[] = 'The current request contains conflicting URLs across containers: '.implode(', ', $duplicates->toArray());
+            $errors[] = 'The current request contains conflicting URLs across containers: '.implode(', ', $duplicates->toArray()).'. Use force_domain_override=true to proceed.';
         }
 
         if (count($errors) > 0) {