diff --git a/fe/fe-core/src/main/java/org/apache/doris/analysis/CreateTableStmt.java b/fe/fe-core/src/main/java/org/apache/doris/analysis/CreateTableStmt.java
index de10c63b47..8180b7681e 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/analysis/CreateTableStmt.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/analysis/CreateTableStmt.java
@@ -376,9 +376,9 @@ public class CreateTableStmt extends DdlStmt {
         if (Config.enable_batch_delete_by_default
                 && keysDesc != null
                 && keysDesc.getKeysType() == KeysType.UNIQUE_KEYS) {
-            // TODO(zhangchen): Disable the delete sign column for primary key temporary, will replace
-            // with a better solution later.
-            if (!enableUniqueKeyMergeOnWrite) {
+            if (enableUniqueKeyMergeOnWrite) {
+                columnDefs.add(ColumnDef.newDeleteSignColumnDef(AggregateType.NONE));
+            } else {
                 columnDefs.add(ColumnDef.newDeleteSignColumnDef(AggregateType.REPLACE));
             }
         }
diff --git a/fe/fe-core/src/main/java/org/apache/doris/catalog/Column.java b/fe/fe-core/src/main/java/org/apache/doris/catalog/Column.java
index 669f2bfe6d..0ee50d7651 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/catalog/Column.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/catalog/Column.java
@@ -241,7 +241,9 @@ public class Column implements Writable {
     }
 
     public boolean isDeleteSignColumn() {
-        return !visible && aggregationType == AggregateType.REPLACE && nameEquals(DELETE_SIGN, true);
+        // aggregationType is NONE for unique table with merge on write.
+        return !visible && (aggregationType == AggregateType.REPLACE
+                || aggregationType == AggregateType.NONE) && nameEquals(DELETE_SIGN, true);
     }
 
     public boolean isSequenceColumn() {