Rename CLIENT_ID_MISSING as CLIENT_ID_REQUIRED (#50)

diff --git a/apache/rocketmq/v2/definition.proto b/apache/rocketmq/v2/definition.proto
index 72548cd..71dc72b 100644
--- a/apache/rocketmq/v2/definition.proto
+++ b/apache/rocketmq/v2/definition.proto
@@ -336,7 +336,7 @@
   // Message is corrupted.
   MESSAGE_CORRUPTED = 40016;
   // Request is rejected due to missing of x-mq-client-id header.
-  CLIENT_ID_MISSING = 40017;
+  CLIENT_ID_REQUIRED = 40017;
 
   // Generic code indicates that the client request lacks valid authentication
   // credentials for the requested resource.
diff --git a/status_code.md b/status_code.md
index 2c0564e..732e828 100644
--- a/status_code.md
+++ b/status_code.md
@@ -35,7 +35,7 @@
 |           UNRECOGNIZED_CLIENT_TYPE           |     ❌      |     ✅     |      ❌      |        ❌        |       ❌        |     ❌      |                ❌                |       ❌        |            ✅            |            ❌            |
 |               MULTIPLE_RESULTS               |     ❌      |     ❌     |      ✅      |        ❌        |       ❌        |     ✅      |                ❌                |       ❌        |            ❌            |            ❌            |
 |                 BAD_REQUEST                  |     ❌      |     ❌     |      ❌      |        ❌        |       ❌        |     ❌      |                ❌                |       ❌        |            ❌            |            ❌            |
-|              CLIENT_ID_MISSING               |     ✅      |     ✅     |      ✅      |        ✅        |       ✅        |     ✅      |                ✅                |       ✅        |            ✅            |            ✅            |
+|              CLIENT_ID_REQUIRED              |     ✅      |     ✅     |      ✅      |        ✅        |       ✅        |     ✅      |                ✅                |       ✅        |            ✅            |            ✅            |
 |            INTERNAL_SERVER_ERROR             |     ✅      |     ✅     |      ✅      |        ✅        |       ✅        |     ✅      |                ✅                |       ✅        |            ✅            |            ✅            |
 |               NOT_IMPLEMENTED                |     ❌      |     ❌     |      ❌      |        ❌        |       ❌        |     ❌      |                ❌                |       ❌        |            ❌            |            ❌            |
 |                PROXY_TIMEOUT                 |     ✅      |     ❌     |      ✅      |        ✅        |       ✅        |     ✅      |                ✅                |       ✅        |            ❌            |            ✅            |