diff --git a/docs/data-operate/update/multi-stream-update-for-unique-model.md b/docs/data-operate/update/multi-stream-update-for-unique-model.md
index 4966c728aed74..c51bc43a86da3 100644
--- a/docs/data-operate/update/multi-stream-update-for-unique-model.md
+++ b/docs/data-operate/update/multi-stream-update-for-unique-model.md
@@ -256,4 +256,6 @@ MySQL > select * from upsert_test;
 
 7. Creating RollUp is not currently supported 
 
-8. If the sequence_mapping attribute is not included when creating a new table, it will not be supported to open it later 
\ No newline at end of file
+8. If the sequence_mapping attribute is not included when creating a new table, it will not be supported to open it later 
+
+9. Fields that are not included will be automatically filled with default values or null during load data. When comparing values for the sequence columns, null values will be treated as the smallest value. 
\ No newline at end of file
diff --git a/i18n/zh-CN/docusaurus-plugin-content-docs/current/data-operate/update/multi-stream-update-for-unique-model.md b/i18n/zh-CN/docusaurus-plugin-content-docs/current/data-operate/update/multi-stream-update-for-unique-model.md
index 266b54d68f7d3..8249247f182ba 100644
--- a/i18n/zh-CN/docusaurus-plugin-content-docs/current/data-operate/update/multi-stream-update-for-unique-model.md
+++ b/i18n/zh-CN/docusaurus-plugin-content-docs/current/data-operate/update/multi-stream-update-for-unique-model.md
@@ -251,4 +251,6 @@ MySQL > select * from upsert_test;
 
 7. 暂时不支持创建RollUp
 
-8. 如果新建表时没带sequence_mapping属性，后期不支持打开
\ No newline at end of file
+8. 如果新建表时没带sequence_mapping属性，后期不支持打开
+
+9. 导入时对于没有包含的字段会自动用默认值或null填充，sequence列比较大小时null值会被当做最小值看待
\ No newline at end of file