diff --git a/src/main/java/com/imyeyu/spring/service/AbstractEntityService.java b/src/main/java/com/imyeyu/spring/service/AbstractEntityService.java
index 09335bc..fd16677 100644
--- a/src/main/java/com/imyeyu/spring/service/AbstractEntityService.java
+++ b/src/main/java/com/imyeyu/spring/service/AbstractEntityService.java
@@ -56,12 +56,6 @@ public abstract class AbstractEntityService<T, P> implements BaseService<T, P> {
 
 	public void update(T t) {
 		checkMapper();
-		if (t instanceof Creatable creatable) {
-			creatable.setCreatedAt(null);
-		}
-		if (t instanceof Deletable deletable) {
-			deletable.setDeletedAt(null);
-		}
 		baseMapper.updateSelective(t);
 	}
 
diff --git a/src/main/java/com/imyeyu/spring/util/SQLProvider.java b/src/main/java/com/imyeyu/spring/util/SQLProvider.java
index 816bdb0..ddbf5de 100644
--- a/src/main/java/com/imyeyu/spring/util/SQLProvider.java
+++ b/src/main/java/com/imyeyu/spring/util/SQLProvider.java
@@ -263,15 +263,9 @@ public class SQLProvider {
 		TimiException.required(meta.idFieldColumn, "not found id field in %s".formatted(meta.entityClass));
 		TimiException.required(meta.canUpdate, "not allow update for %s".formatted(meta.entityClass));
 
-		if (entity instanceof Creatable creatable) {
-			creatable.setCreatedAt(null);
-		}
 		if (entity instanceof Updatable updatable) {
 			updatable.setUpdatedAt(Time.now());
 		}
-		if (entity instanceof Deletable deletable) {
-			deletable.setDeletedAt(null);
-		}
 		String setClause = meta.fieldColumnList.stream()
 		                                       .filter(FieldColumn::isNotId)
 		                                       .filter(fc -> fc.isNotNull(entity))