diff --git a/powerjob-common/src/main/java/tech/powerjob/common/enums/ErrorCodes.java b/powerjob-common/src/main/java/tech/powerjob/common/enums/ErrorCodes.java
index db0043c6..dfd42ce5 100644
--- a/powerjob-common/src/main/java/tech/powerjob/common/enums/ErrorCodes.java
+++ b/powerjob-common/src/main/java/tech/powerjob/common/enums/ErrorCodes.java
@@ -49,6 +49,10 @@ public enum ErrorCodes {
      * 系统内部异常
      */
     SYSTEM_UNKNOWN_ERROR("-500", "SYS_UNKNOWN_ERROR"),
+    /**
+     * 非法参数
+     */
+    ILLEGAL_ARGS_ERROR("-501", "ILLEGAL_ARGS_ERROR"),
 
     /**
      * OPENAPI 错误码号段 -10XX
diff --git a/powerjob-common/src/main/java/tech/powerjob/common/exception/PowerJobExceptionLauncher.java b/powerjob-common/src/main/java/tech/powerjob/common/exception/PowerJobExceptionLauncher.java
new file mode 100644
index 00000000..d86e13af
--- /dev/null
+++ b/powerjob-common/src/main/java/tech/powerjob/common/exception/PowerJobExceptionLauncher.java
@@ -0,0 +1,17 @@
+package tech.powerjob.common.exception;
+
+
+import tech.powerjob.common.enums.ErrorCodes;
+
+/**
+ * PowerJobExceptionLauncher
+ *
+ * @author tjq
+ * @since 2024/11/22
+ */
+public class PowerJobExceptionLauncher {
+
+    public PowerJobExceptionLauncher(ErrorCodes errorCode, String message) {
+        throw new PowerJobException(errorCode, message);
+    }
+}
diff --git a/powerjob-server/powerjob-server-starter/src/main/java/tech/powerjob/server/web/controller/AppInfoController.java b/powerjob-server/powerjob-server-starter/src/main/java/tech/powerjob/server/web/controller/AppInfoController.java
index 36d048ef..6b312ad4 100644
--- a/powerjob-server/powerjob-server-starter/src/main/java/tech/powerjob/server/web/controller/AppInfoController.java
+++ b/powerjob-server/powerjob-server-starter/src/main/java/tech/powerjob/server/web/controller/AppInfoController.java
@@ -17,6 +17,8 @@ import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
+import tech.powerjob.common.enums.ErrorCodes;
+import tech.powerjob.common.exception.PowerJobExceptionLauncher;
 import tech.powerjob.common.response.ResultDTO;
 import tech.powerjob.common.serialize.JsonUtils;
 import tech.powerjob.common.utils.CommonUtils;
@@ -85,9 +87,14 @@ public class AppInfoController {
 
         Long id = req.getId();
         if (id == null) {
+
+            // 前置校验，防止部分没加唯一索引的 DB 重复创建记录导致异常
+            appInfoRepository.findByAppName(req.getAppName()).ifPresent(x -> new PowerJobExceptionLauncher(ErrorCodes.ILLEGAL_ARGS_ERROR, String.format("App[%s] already exists", req.getAppName())));
+
             appInfoDO = new AppInfoDO();
             appInfoDO.setGmtCreate(new Date());
             appInfoDO.setCreator(LoginUserHolder.getUserId());
+
         } else {
             appInfoDO = appInfoService.findById(id, false).orElseThrow(() -> new IllegalArgumentException("can't find appInfo by id:" + id));
 
diff --git a/powerjob-server/powerjob-server-starter/src/main/java/tech/powerjob/server/web/service/impl/NamespaceWebServiceImpl.java b/powerjob-server/powerjob-server-starter/src/main/java/tech/powerjob/server/web/service/impl/NamespaceWebServiceImpl.java
index e504bc81..342dbfd6 100644
--- a/powerjob-server/powerjob-server-starter/src/main/java/tech/powerjob/server/web/service/impl/NamespaceWebServiceImpl.java
+++ b/powerjob-server/powerjob-server-starter/src/main/java/tech/powerjob/server/web/service/impl/NamespaceWebServiceImpl.java
@@ -8,12 +8,14 @@ import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.domain.Specification;
 import org.springframework.stereotype.Service;
+import tech.powerjob.common.enums.ErrorCodes;
+import tech.powerjob.common.enums.SwitchableStatus;
 import tech.powerjob.common.exception.PowerJobException;
+import tech.powerjob.common.exception.PowerJobExceptionLauncher;
 import tech.powerjob.server.auth.LoginUserHolder;
 import tech.powerjob.server.auth.RoleScope;
 import tech.powerjob.server.auth.service.WebAuthService;
 import tech.powerjob.server.common.SJ;
-import tech.powerjob.common.enums.SwitchableStatus;
 import tech.powerjob.server.persistence.QueryConvertUtils;
 import tech.powerjob.server.persistence.remote.model.AppInfoDO;
 import tech.powerjob.server.persistence.remote.model.NamespaceDO;
@@ -57,6 +59,9 @@ public class NamespaceWebServiceImpl implements NamespaceWebService {
         boolean isCreate = id == null;
 
         if (isCreate) {
+
+            namespaceRepository.findByCode(req.getCode()).ifPresent(x -> new PowerJobExceptionLauncher(ErrorCodes.ILLEGAL_ARGS_ERROR, String.format("namespace[%s] already exists", req.getCode())));
+
             namespaceDO = new NamespaceDO();
             namespaceDO.setGmtCreate(new Date());