diff --git a/backend/src/main/java/io/metersphere/track/service/TestCaseService.java b/backend/src/main/java/io/metersphere/track/service/TestCaseService.java
index 2e2ea78c69..bf5e583a3b 100644
--- a/backend/src/main/java/io/metersphere/track/service/TestCaseService.java
+++ b/backend/src/main/java/io/metersphere/track/service/TestCaseService.java
@@ -151,7 +151,7 @@ public class TestCaseService {
                 .andIdNotEqualTo(testCase.getId());
         List<TestCase> list = testCaseMapper.selectByExample(example);
         if (CollectionUtils.isNotEmpty(list)) {
-            MSException.throwException("test case custom num is exist.");
+            MSException.throwException(Translator.get("custom_num_is_exist"));
         }
     }
 
diff --git a/backend/src/main/resources/i18n/messages_en_US.properties b/backend/src/main/resources/i18n/messages_en_US.properties
index 6e658c5e39..74ce602a5d 100644
--- a/backend/src/main/resources/i18n/messages_en_US.properties
+++ b/backend/src/main/resources/i18n/messages_en_US.properties
@@ -154,6 +154,7 @@ test_case_already_exists_excel=There are duplicate test cases in the import file
 test_case_module_already_exists=The module name already exists at the same level
 api_test_name_already_exists=Test name already exists
 functional_method_tip=Functional test not support auto method
+custom_num_is_exist=Use case custom ID already exists
 #ldap
 ldap_url_is_null=LDAP address is empty
 ldap_dn_is_null=LDAP binding DN is empty
diff --git a/backend/src/main/resources/i18n/messages_zh_CN.properties b/backend/src/main/resources/i18n/messages_zh_CN.properties
index 4234f9553e..483e89fe17 100644
--- a/backend/src/main/resources/i18n/messages_zh_CN.properties
+++ b/backend/src/main/resources/i18n/messages_zh_CN.properties
@@ -154,6 +154,7 @@ test_case_already_exists_excel=文件中存在多条相同用例
 test_case_module_already_exists=同层级下已存在该模块名称
 api_test_name_already_exists=测试名称已经存在
 functional_method_tip=功能测试不支持自动方式
+custom_num_is_exist=用例自定义ID已存在
 #ldap
 ldap_url_is_null=LDAP地址为空
 ldap_dn_is_null=LDAP绑定DN为空
diff --git a/backend/src/main/resources/i18n/messages_zh_TW.properties b/backend/src/main/resources/i18n/messages_zh_TW.properties
index 65c384ca7b..683414f060 100644
--- a/backend/src/main/resources/i18n/messages_zh_TW.properties
+++ b/backend/src/main/resources/i18n/messages_zh_TW.properties
@@ -154,6 +154,7 @@ test_case_already_exists_excel=文件中存在多條相同用例
 test_case_module_already_exists=同層級下已存在該模塊名稱
 api_test_name_already_exists=測試名稱已經存在
 functional_method_tip=功能測試不支持自動方式
+custom_num_is_exist=用例自定義ID已存在
 #ldap
 ldap_url_is_null=LDAP地址為空
 ldap_dn_is_null=LDAP綁定DN為空