diff --git a/server/wsproxy/mastersvrmgr.cc b/server/wsproxy/mastersvrmgr.cc
index 7b84546..d4f56fd 100644
--- a/server/wsproxy/mastersvrmgr.cc
+++ b/server/wsproxy/mastersvrmgr.cc
@@ -154,11 +154,12 @@ void MasterSvrMgr::RequestTargetServer(f8::MsgHdr& hdr, const std::string& team_
 void MasterSvrMgr::RemoveRequest(int socket_handle, long long context_id, bool auto_free)
 {
     if (context_id == GetContextIdBySocket(socket_handle)) {
-        if (auto_free) {
-            f8::MsgHdr* hdr = GetHdrByContextId(context_id);
-            if (hdr) {
-                a8::TimerAttacher* timer_attacher = (a8::TimerAttacher*)hdr->user_data;
-                delete timer_attacher;
+        f8::MsgHdr* hdr = GetHdrByContextId(context_id);
+        if (hdr) {
+            a8::TimerAttacher* timer_attacher = (a8::TimerAttacher*)hdr->user_data;
+            delete timer_attacher;
+            hdr->user_data = nullptr;
+            if (auto_free) {
                 if (hdr->buf) {
                     free((char*)hdr->buf);
                 }