diff --git a/app/Http/Requests/Back/Users/Concerns/HasUserRequestRules.php b/app/Http/Requests/Back/Users/Concerns/HasUserRequestRules.php
index 6b1c740..59a394b 100644
--- a/app/Http/Requests/Back/Users/Concerns/HasUserRequestRules.php
+++ b/app/Http/Requests/Back/Users/Concerns/HasUserRequestRules.php
@@ -24,6 +24,7 @@ trait HasUserRequestRules
             'isClient'         => $role === UserRoleRegistry::get('client')->value,
             'isProjectManager' => $role === UserRoleRegistry::get('project-manager')->value,
             'isDevelopper'     => $role === UserRoleRegistry::get('developper')->value,
+            'isConceptor'      => $role === UserRoleRegistry::get('conceptor')->value,
         ];
     }
 
@@ -36,12 +37,20 @@ trait HasUserRequestRules
             'isClient'         => $isClient,
             'isProjectManager' => $isProjectManager,
             'isDevelopper'     => $isDevelopper,
+            'isConceptor'      => $isConceptor,
         ] = $this->resolveRoleFlags();
+        $userRole = auth('backend')->user()->role->value === $isConceptor;
 
-        $this->merge([
-            'gitlab_id' => $isProjectManager || $isDevelopper ? $this->input('gitlab_id') : null,
-            'sites'     => $isClient ? $this->input('sites') : null,
-        ]);
+        if ($userRole && ($isProjectManager || $isDevelopper)) {
+            $this->merge([
+                'gitlab_id' => $this->input('gitlab_id'),
+            ]);
+        }
+        if ($isClient) {
+            $this->merge([
+                'sites' => $this->input('sites'),
+            ]);
+        }
     }
 
     /**
@@ -55,11 +64,15 @@ trait HasUserRequestRules
             'isClient'         => $isClient,
             'isProjectManager' => $isProjectManager,
             'isDevelopper'     => $isDevelopper,
+            'isConceptor'      => $isConceptor,
         ] = $this->resolveRoleFlags();
+        $userRole = auth('backend')->user()->role->value === $isConceptor;
 
         return [
-            'gitlab_id' => $isProjectManager || $isDevelopper ? 'required|integer|min:1' : 'nullable|integer|min:1',
-            'sites'     => $isClient ? 'required|array' : 'nullable|array',
+            'gitlab_id' => $userRole && ($isProjectManager || $isDevelopper)
+                ? 'required|integer|min:1'
+                : 'nullable|integer|min:1',
+            'sites'     => $userRole && $isClient ? 'required|array' : 'nullable|array',
             'sites.*'   => 'integer|exists:sites,id|distinct',
         ];
     }