From ae5877344afe09dc4508dbad370fc3ef0a9e8c9e Mon Sep 17 00:00:00 2001
From: libo <zerolbsony@163.com>
Date: Wed, 21 Jan 2026 19:34:49 +0800
Subject: [PATCH 1/2] Fix the problem that "StateMachineProceduree not set next
 state, but return HAS_MORE_STATE".

---
 .../procedure/impl/schema/AlterTimeSeriesDataTypeProcedure.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/procedure/impl/schema/AlterTimeSeriesDataTypeProcedure.java b/iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/procedure/impl/schema/AlterTimeSeriesDataTypeProcedure.java
index ccd83014f643..ad1d04ca6eeb 100644
--- a/iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/procedure/impl/schema/AlterTimeSeriesDataTypeProcedure.java
+++ b/iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/procedure/impl/schema/AlterTimeSeriesDataTypeProcedure.java
@@ -124,7 +124,7 @@ protected StateMachineProcedure.Flow executeFromState(
               this::setFailure,
               true);
           collectPayload4Pipe(env);
-          break;
+          return Flow.NO_MORE_STATE;
         default:
           setFailure(
               new ProcedureException(

From c6218336b3b353bea167b4aaf124aedd6eb42f46 Mon Sep 17 00:00:00 2001
From: libo <zerolbsony@163.com>
Date: Mon, 26 Jan 2026 18:36:13 +0800
Subject: [PATCH 2/2] Adjust error message.

---
 .../impl/schema/AlterTimeSeriesDataTypeProcedure.java      | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/procedure/impl/schema/AlterTimeSeriesDataTypeProcedure.java b/iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/procedure/impl/schema/AlterTimeSeriesDataTypeProcedure.java
index 05daf8c900de..2bbfde0e142f 100644
--- a/iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/procedure/impl/schema/AlterTimeSeriesDataTypeProcedure.java
+++ b/iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/procedure/impl/schema/AlterTimeSeriesDataTypeProcedure.java
@@ -235,11 +235,8 @@ protected void onAllReplicasetFailure(
                 new ProcedureException(
                     new MetadataException(
                         String.format(
-                            "Alter timeseries %s data type from %s to %s in schema regions failed. Failures: %s",
-                            measurementPath.getFullPath(),
-                            measurementPath.getSeriesType(),
-                            dataType,
-                            printFailureMap()))));
+                            "Alter timeseries %s data type to %s in schema regions failed. Failures: %s",
+                            measurementPath.getFullPath(), dataType, printFailureMap()))));
             interruptTask();
           }
         };