diff --git a/app/Http/Controllers/Api/ApplicationsController.php b/app/Http/Controllers/Api/ApplicationsController.php
index 24e8394a4..ba8df932b 100644
--- a/app/Http/Controllers/Api/ApplicationsController.php
+++ b/app/Http/Controllers/Api/ApplicationsController.php
@@ -1156,6 +1156,11 @@ private function create_application(Request $request, $type)
                     return $url;
                 });
 
+                $duplicates = $urls->duplicates()->unique()->values();
+                if ($duplicates->isNotEmpty() && ! $request->boolean('force_domain_override')) {
+                    $errors[] = 'The current request contains conflicting URLs: '.implode(', ', $duplicates->toArray());
+                }
+
                 if (count($errors) > 0) {
                     return response()->json([
                         'message' => 'Validation failed.',
@@ -1364,6 +1369,11 @@ private function create_application(Request $request, $type)
                     return $url;
                 });
 
+                $duplicates = $urls->duplicates()->unique()->values();
+                if ($duplicates->isNotEmpty() && ! $request->boolean('force_domain_override')) {
+                    $errors[] = 'The current request contains conflicting URLs: '.implode(', ', $duplicates->toArray());
+                }
+
                 if (count($errors) > 0) {
                     return response()->json([
                         'message' => 'Validation failed.',
@@ -1540,6 +1550,11 @@ private function create_application(Request $request, $type)
                     return $url;
                 });
 
+                $duplicates = $urls->duplicates()->unique()->values();
+                if ($duplicates->isNotEmpty() && ! $request->boolean('force_domain_override')) {
+                    $errors[] = 'The current request contains conflicting URLs: '.implode(', ', $duplicates->toArray());
+                }
+
                 if (count($errors) > 0) {
                     return response()->json([
                         'message' => 'Validation failed.',
@@ -2549,6 +2564,11 @@ public function update_by_uuid(Request $request)
                 return $url;
             });
 
+            $duplicates = $urls->duplicates()->unique()->values();
+            if ($duplicates->isNotEmpty() && ! $request->boolean('force_domain_override')) {
+                $errors[] = 'The current request contains conflicting URLs: '.implode(', ', $duplicates->toArray());
+            }
+
             if (count($errors) > 0) {
                 return response()->json([
                     'message' => 'Validation failed.',