diff --git a/src/mito2/src/worker/handle_alter.rs b/src/mito2/src/worker/handle_alter.rs
index 94464685004c..705a46e9f992 100644
--- a/src/mito2/src/worker/handle_alter.rs
+++ b/src/mito2/src/worker/handle_alter.rs
@@ -17,7 +17,7 @@
 use std::sync::Arc;
 
 use common_query::Output;
-use common_telemetry::{error, info};
+use common_telemetry::{error, info, warn};
 use snafu::ResultExt;
 use store_api::metadata::{RegionMetadata, RegionMetadataBuilder, RegionMetadataRef};
 use store_api::region_request::RegionAlterRequest;
@@ -48,6 +48,10 @@ impl<S> RegionWorkerLoop<S> {
         // Get the version before alter.
         let version = region.version();
         if version.metadata.schema_version >= request.schema_version {
+            warn!(
+                "region schema version {} greater than request schema version {}",
+                version.metadata.schema_version, request.schema_version
+            );
             // Returns if it altered.
             sender.send(Ok(Output::AffectedRows(0)));
             return;