diff --git a/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/knowledgebase/KnowledgeBaseServiceImpl.java b/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/knowledgebase/KnowledgeBaseServiceImpl.java
index 1131a78ff..a5f72afbe 100644
--- a/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/knowledgebase/KnowledgeBaseServiceImpl.java
+++ b/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/knowledgebase/KnowledgeBaseServiceImpl.java
@@ -124,7 +124,6 @@ public class KnowledgeBaseServiceImpl implements KnowledgeBaseService {
         // 获取需要保留的文档 ID
         List<Long> retainedIds = documents.stream()
                 .map(KnowledgeDocumentsSaveReqVO::getId)
-                .filter(Objects::nonNull)
                 .collect(Collectors.toList());
 
         // 删除不需要保留的文档