diff --git a/doc/doc-server/src/main/java/cn/axzo/nanopart/doc/file/index/IndexSupport.java b/doc/doc-server/src/main/java/cn/axzo/nanopart/doc/file/index/IndexSupport.java
index 4b6c5d40..9b8e89aa 100644
--- a/doc/doc-server/src/main/java/cn/axzo/nanopart/doc/file/index/IndexSupport.java
+++ b/doc/doc-server/src/main/java/cn/axzo/nanopart/doc/file/index/IndexSupport.java
@@ -31,6 +31,7 @@ import cn.axzo.nanopart.doc.dao.DocLockDao;
 import cn.axzo.nanopart.doc.dao.IndexNodeDao;
 import cn.axzo.nanopart.doc.entity.IndexNode;
 import cn.axzo.nanopart.doc.entity.domain.Path;
+import cn.axzo.nanopart.doc.file.index.domain.NameUsedException;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 
@@ -131,7 +132,8 @@ public class IndexSupport {
 
 	void ensureChildNameNotUsed(IndexNodeParentScope parentScope, IndexNodeType nodeType, String childName) {
 		IndexNode child = indexNodeDao.findValidChildByName(parentScope, nodeType, childName);
-		BizAssertions.assertNull(child, "名称已被使用");
+		if (child != null)
+			throw new NameUsedException("名称已被使用");
 	}
 
 	void lockParentAndReleaseOnCommit(IndexNodeParentScope parentScope) {