diff --git a/services/NormalBot.php b/services/NormalBot.php
index fd0f821..b629e17 100644
--- a/services/NormalBot.php
+++ b/services/NormalBot.php
@@ -136,6 +136,14 @@ class NormalBot
         $group    = $col['meta_group'] ?? '';
         $key      = $col['meta_key']   ?? '';
         $nextNode = $col['next_node']  ?? null;
+        $validIds = $col['__valid_ids'] ?? null;
+
+        if ($validIds !== null && !in_array(trim($input), $validIds, true)) {
+            return self::sendText(
+                '⚠️ Por favor selecciona una opción válida de la lista.',
+                $context['from'], $company
+            );
+        }
 
         $formData        = $meta[$group] ?? [];
         $formData[$key]  = trim($input);
@@ -182,10 +190,12 @@ class NormalBot
             );
         }
 
+        $valueField = $flow['value_field'] ?? 'id';
         $meta['collecting'] = [
-            'meta_group' => $flow['meta_group'] ?? '',
-            'meta_key'   => $flow['meta_key']   ?? '',
-            'next_node'  => $flow['next_node']  ?? null,
+            'meta_group'  => $flow['meta_group'] ?? '',
+            'meta_key'    => $flow['meta_key']   ?? '',
+            'next_node'   => $flow['next_node']  ?? null,
+            '__valid_ids' => array_column($items, $valueField),
         ];
         ConversationContext::updateMetadata($ctxId, $meta);
         ConversationContext::updateNode($ctxId, 'collecting');