diff --git a/easyflow-modules/easyflow-module-ai/src/main/java/tech/easyflow/ai/service/impl/FaqItemServiceImpl.java b/easyflow-modules/easyflow-module-ai/src/main/java/tech/easyflow/ai/service/impl/FaqItemServiceImpl.java
index 176e7fb..bc424e5 100644
--- a/easyflow-modules/easyflow-module-ai/src/main/java/tech/easyflow/ai/service/impl/FaqItemServiceImpl.java
+++ b/easyflow-modules/easyflow-module-ai/src/main/java/tech/easyflow/ai/service/impl/FaqItemServiceImpl.java
@@ -11,6 +11,8 @@ import com.mybatisflex.core.query.QueryWrapper;
 import com.mybatisflex.spring.service.impl.ServiceImpl;
 import org.jsoup.Jsoup;
 import org.jsoup.safety.Safelist;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -19,8 +21,8 @@ import tech.easyflow.ai.entity.DocumentCollection;
 import tech.easyflow.ai.entity.FaqItem;
 import tech.easyflow.ai.entity.Model;
 import tech.easyflow.ai.mapper.FaqItemMapper;
-import tech.easyflow.ai.service.FaqCategoryService;
 import tech.easyflow.ai.service.DocumentCollectionService;
+import tech.easyflow.ai.service.FaqCategoryService;
 import tech.easyflow.ai.service.FaqItemService;
 import tech.easyflow.ai.service.ModelService;
 import tech.easyflow.common.util.StringUtil;
@@ -28,10 +30,7 @@ import tech.easyflow.common.web.exceptions.BusinessException;
 
 import javax.annotation.Resource;
 import java.math.BigInteger;
-import java.util.Collections;
-import java.util.Date;
-import java.util.HashMap;
-import java.util.Map;
+import java.util.*;
 
 import static tech.easyflow.ai.entity.DocumentCollection.KEY_CAN_UPDATE_EMBEDDING_MODEL;
 import static tech.easyflow.ai.entity.DocumentCollection.KEY_SEARCH_ENGINE_TYPE;
@@ -39,6 +38,7 @@ import static tech.easyflow.ai.entity.DocumentCollection.KEY_SEARCH_ENGINE_TYPE;
 @Service
 public class FaqItemServiceImpl extends ServiceImpl<FaqItemMapper, FaqItem> implements FaqItemService {
 
+    private static final Logger LOG = LoggerFactory.getLogger(FaqItemServiceImpl.class);
     private static final Safelist ANSWER_SAFE_LIST = Safelist.basic()
             .addTags("h1", "h2", "h3", "h4", "h5", "h6");
 
@@ -190,16 +190,44 @@ public class FaqItemServiceImpl extends ServiceImpl<FaqItemMapper, FaqItem> impl
 
     private void removeFromVector(DocumentCollection collection, FaqItem entity) {
         PreparedStore preparedStore = prepareStore(collection);
-        preparedStore.documentStore.delete(Collections.singletonList(entity.getId()), preparedStore.storeOptions);
+        boolean deleteSuccess = deleteFromVectorStore(preparedStore.documentStore, preparedStore.storeOptions, entity.getId());
+        if (!deleteSuccess) {
+            throw new BusinessException("FAQ向量删除失败");
+        }
 
         if (collection.isSearchEngineEnabled()) {
             DocumentSearcher searcher = searcherFactory.getSearcher((String) collection.getOptionsByKey(KEY_SEARCH_ENGINE_TYPE));
             if (searcher != null) {
-                searcher.deleteDocument(entity.getId());
+                boolean removed = searcher.deleteDocument(entity.getId());
+                if (!removed) {
+                    LOG.warn("Delete faq search index failed. faqId={}, searcherType={}",
+                            entity.getId(), collection.getOptionsByKey(KEY_SEARCH_ENGINE_TYPE));
+                }
             }
         }
     }
 
+    private boolean deleteFromVectorStore(DocumentStore documentStore, StoreOptions storeOptions, BigInteger id) {
+        List<Object> candidates = new ArrayList<>(3);
+        candidates.add(id);
+        candidates.add(String.valueOf(id));
+        try {
+            candidates.add(id.longValueExact());
+        } catch (ArithmeticException ignored) {
+            // 非 long 范围不追加 long 类型候选
+        }
+
+        for (Object candidate : candidates) {
+            StoreResult deleteResult = documentStore.delete(Collections.singletonList(candidate), storeOptions);
+            if (deleteResult != null && deleteResult.isSuccess()) {
+                return true;
+            }
+            LOG.warn("Delete faq vector by id candidate failed. faqId={}, candidateType={}, candidate={}",
+                    id, candidate == null ? "null" : candidate.getClass().getSimpleName(), candidate);
+        }
+        return false;
+    }
+
     private PreparedStore prepareStore(DocumentCollection collection) {
         DocumentStore documentStore;
         try {