diff --git a/curp/src/client_new/tests.rs b/curp/src/client_new/tests.rs
index 8b4a003ab..0a65ea2d3 100644
--- a/curp/src/client_new/tests.rs
+++ b/curp/src/client_new/tests.rs
@@ -130,8 +130,8 @@ async fn test_unary_fetch_clusters_linearizable() {
                         cluster_version: 1,
                     },
                     2 => FetchClusterResponse {
-                        leader_id: None, // imagine this node is a disconnected candidate
-                        term: 23,        // with a high term
+                        leader_id: None,
+                        term: 23,        // abnormal term
                         cluster_id: 123,
                         members: vec![],
                         cluster_version: 1,
diff --git a/curp/src/client_new/unary.rs b/curp/src/client_new/unary.rs
index a434a3156..3e85c32e6 100644
--- a/curp/src/client_new/unary.rs
+++ b/curp/src/client_new/unary.rs
@@ -238,9 +238,9 @@ impl<C: Command> Unary<C> {
         if !Self::check_and_update_leader(&mut state, res.leader_id, res.term) {
             return Ok(());
         }
-        if state.cluster_version >= res.cluster_version {
+        if state.cluster_version == res.cluster_version {
             debug!(
-                "ignore old cluster version({}) from server",
+                "ignore cluster version({}) from server",
                 res.cluster_version
             );
             return Ok(());
@@ -644,7 +644,6 @@ impl<C: Command> ClientApi for Unary<C> {
                 }
             };
             // Ignore the response of a node that doesn't know who the leader is.
-            // some disconnected candidates may continue to increase term, disrupting the process below.
             if inner.leader_id.is_some() {
                 #[allow(clippy::integer_arithmetic)]
                 match max_term.cmp(&inner.term) {
diff --git a/xlineapi/proto b/xlineapi/proto
index 2331b11cf..e8696c7c5 160000
--- a/xlineapi/proto
+++ b/xlineapi/proto
@@ -1 +1 @@
-Subproject commit 2331b11cf35d9528fad3e3d9abe4837d93cd04cc
+Subproject commit e8696c7c53b44e7096f621d48b607d40d7a8bed3