diff --git a/services/ErpSync.php b/services/ErpSync.php
index a5ca468..77b8232 100644
--- a/services/ErpSync.php
+++ b/services/ErpSync.php
@@ -9,11 +9,11 @@ class ErpSync
         $apiKey = env('ERP_SYNC_API_KEY', '');
 
         if ($apiUrl === '') {
-            return ['error' => 'ERP_SYNC_API_URL no configurado'];
+            return ['error' => 'ERP_SYNC_API_URL no configurado en .env'];
         }
 
         $httpHeader = ['Accept: application/json'];
-        if ($apiKey !== '') {
+        if ($apiKey !== '' && $apiKey !== 'token_para_sincronizar_empresas') {
             $httpHeader[] = 'Authorization: Bearer ' . $apiKey;
         }
 
@@ -26,15 +26,20 @@ class ErpSync
 
         $response = curl_exec($ch);
         $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+        $curlErr  = curl_error($ch);
         curl_close($ch);
 
+        if ($curlErr !== '') {
+            return ['error' => 'cURL error: ' . $curlErr];
+        }
+
         if ($httpCode !== 200) {
-            return ['error' => "HTTP {$httpCode}", 'response' => mb_substr((string)$response, 0, 1000)];
+            return ['error' => "HTTP {$httpCode}", 'response' => mb_substr((string)$response, 0, 500)];
         }
 
         $companies = json_decode($response, true);
         if (!is_array($companies)) {
-            return ['error' => 'JSON inválido del ERP'];
+            return ['error' => 'Respuesta no es JSON válido', 'raw' => mb_substr((string)$response, 0, 300)];
         }
 
         $synced = 0;
@@ -45,42 +50,46 @@ class ErpSync
                 self::upsert($company);
                 $synced++;
             } catch (\Exception $e) {
-                $errors[] = $e->getMessage();
+                $errors[] = ($company['name'] ?? '?') . ': ' . $e->getMessage();
             }
         }
 
-        return ['synced' => $synced, 'errors' => $errors];
+        return ['synced' => $synced, 'total' => count($companies), 'errors' => $errors];
     }
 
     private static function upsert(array $data): void
     {
+        $name = trim($data['name'] ?? '');
+        if ($name === '') {
+            throw new \InvalidArgumentException('name es requerido');
+        }
+
+        // Never overwrite config_json — that holds all bot flows/menus configured by admins.
+        // Never overwrite phone_number_id — set manually per company.
         $stmt = db()->prepare("
             INSERT INTO companies
-                (name, display_name, phone_number_id, display_phone, api_base_url, api_key, bot_type, requires_approval, is_active, config_json)
-            VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+                (name, display_name, display_phone, api_base_url, api_key, bot_type, requires_approval, is_active)
+            VALUES (?, ?, ?, ?, ?, ?, ?, ?)
             ON DUPLICATE KEY UPDATE
-                name              = VALUES(name),
                 display_name      = VALUES(display_name),
+                display_phone     = VALUES(display_phone),
                 api_base_url      = VALUES(api_base_url),
                 api_key           = VALUES(api_key),
                 bot_type          = VALUES(bot_type),
                 requires_approval = VALUES(requires_approval),
                 is_active         = VALUES(is_active),
-                config_json       = VALUES(config_json),
                 updated_at        = NOW()
         ");
 
         $stmt->execute([
-            $data['name'] ?? '',
-            $data['display_name'] ?? $data['name'] ?? '',
-            $data['phone_number_id'] ?? '',
+            $name,
+            $data['display_name'] ?? $name,
             $data['display_phone'] ?? '',
             $data['api_base_url'] ?? '',
             $data['api_key'] ?? '',
-            $data['bot_type'] ?? 'normal',
+            in_array($data['bot_type'] ?? '', ['ai', 'normal', 'hybrid']) ? $data['bot_type'] : 'normal',
             (int)($data['requires_approval'] ?? 0),
             (int)($data['is_active'] ?? 1),
-            isset($data['config_json']) ? (is_string($data['config_json']) ? $data['config_json'] : json_encode($data['config_json'])) : null,
         ]);
     }
 }