diff --git a/apps/assets/serializers/platform.py b/apps/assets/serializers/platform.py
index 21c6a124a..7485224e7 100644
--- a/apps/assets/serializers/platform.py
+++ b/apps/assets/serializers/platform.py
@@ -131,7 +131,6 @@ class PlatformSerializer(WritableNestedModelSerializer):
         primary = [p for p in protocols if p.get('primary')]
         if not primary:
             protocols[0]['primary'] = True
-            protocols[0]['default'] = False
         # 这里不设置不行，write_nested 不使用 validated 中的
         self.initial_data['protocols'] = protocols
         return protocols