diff --git a/par-core/src/main/java/com/par/core/service/impl/ConfigServiceImpl.java b/par-core/src/main/java/com/par/core/service/impl/ConfigServiceImpl.java
index 8a9bceb..e2067ff 100644
--- a/par-core/src/main/java/com/par/core/service/impl/ConfigServiceImpl.java
+++ b/par-core/src/main/java/com/par/core/service/impl/ConfigServiceImpl.java
@@ -70,7 +70,7 @@ public class ConfigServiceImpl implements ConfigService {
             return sameHash;
         }
 
-        // 存储到抽象存储层
+        // 写入存储
         try {
             storageService.store(storagePath, configJson);
         } catch (Exception e) {
@@ -78,12 +78,34 @@ public class ConfigServiceImpl implements ConfigService {
             throw new RuntimeException("存储配置文件失败: " + e.getMessage(), e);
         }
 
+        long fileSize = configJson.getBytes(StandardCharsets.UTF_8).length;
+
+        // 同一 (site_id, version) 已有 PENDING 记录 → 更新而非新增（避免唯一约束冲突）
+        SiteConfig existingPending = siteConfigMapper.selectOne(
+                new com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper<SiteConfig>()
+                        .eq(SiteConfig::getSiteId, siteId)
+                        .eq(SiteConfig::getVersion, version)
+                        .eq(SiteConfig::getStatus, ConfigStatus.PENDING)
+                        .eq(SiteConfig::getDeleted, 0));
+        if (existingPending != null) {
+            // 删除旧存储文件
+            storageService.delete(existingPending.getStoragePath());
+            existingPending.setConfigHash(configHash);
+            existingPending.setStoragePath(storagePath);
+            existingPending.setFileSize(fileSize);
+            existingPending.setSchemaVersion(schemaVersion != null ? schemaVersion : existingPending.getSchemaVersion());
+            existingPending.setSubmitterId(submitterId);
+            siteConfigMapper.updateById(existingPending);
+            log.info("Config updated: siteId={}, version={}, id={}, hash={}", siteId, version, existingPending.getId(), configHash);
+            return existingPending;
+        }
+
         SiteConfig config = new SiteConfig();
         config.setSiteId(siteId);
-        config.setVersion(version);  // 客户端提交的版本号，仅供参考
+        config.setVersion(version);
         config.setConfigHash(configHash);
         config.setStoragePath(storagePath);
-        config.setFileSize((long) configJson.getBytes(StandardCharsets.UTF_8).length);
+        config.setFileSize(fileSize);
         config.setSchemaVersion(schemaVersion != null ? schemaVersion : "1.0.0");
         config.setStatus(ConfigStatus.PENDING);
         config.setSubmitterId(submitterId);