diff --git a/be/src/runtime/fragment_mgr.cpp b/be/src/runtime/fragment_mgr.cpp
index f1354140ac..b0d00fb99f 100644
--- a/be/src/runtime/fragment_mgr.cpp
+++ b/be/src/runtime/fragment_mgr.cpp
@@ -628,7 +628,6 @@ Status FragmentMgr::exec_plan_fragment(const TExecPlanFragmentParams& params, Fi
                     BackendOptions::get_localhost());
         }
         fragments_ctx = search->second;
-        _set_scan_concurrency(params, fragments_ctx.get());
     } else {
         // This may be a first fragment request of the query.
         // Create the query fragments context.