diff --git a/internal/core/src/segcore/SegmentGrowingImpl.cpp b/internal/core/src/segcore/SegmentGrowingImpl.cpp
index ce2f285eaf..de65712b93 100644
--- a/internal/core/src/segcore/SegmentGrowingImpl.cpp
+++ b/internal/core/src/segcore/SegmentGrowingImpl.cpp
@@ -108,26 +108,10 @@ SegmentGrowingImpl::Insert(int64_t reserved_offset,
         auto field_id = FieldId(field.field_id());
         AssertInfo(!field_id_to_offset.count(field_id), "duplicate field data");
         field_id_to_offset.emplace(field_id, field_offset++);
-        // may be added field, add the null if has existed data
-        if (exist_rows > 0 && !insert_record_.is_data_exist(field_id)) {
-            LOG_WARN(
-                "heterogeneous insert data found for segment {}, field id {}, "
-                "data type {}",
-                id_,
-                field_id.get(),
-                field.type());
-            schema_->AddField(FieldName(field.field_name()),
-                              field_id,
-                              DataType(field.type()),
-                              true,
-                              std::nullopt);
-            auto field_meta = schema_->get_fields().at(field_id);
-            insert_record_.append_field_meta(
-                field_id, field_meta, size_per_chunk(), mmap_descriptor_);
-            auto data = bulk_subscript_not_exist_field(field_meta, exist_rows);
-            insert_record_.get_data_base(field_id)->set_data_raw(
-                0, exist_rows, data.get(), field_meta);
-        }
+        AssertInfo(exist_rows == 0 || insert_record_.is_data_exist(field_id),
+                   "unexpected new field in growing segment {}, field id {}",
+                   id_,
+                   field.field_id());
     }
 
     // segment have latest schema while insert used old one