diff --git a/packages/hydrooj/locales/zh_CN.yaml b/packages/hydrooj/locales/zh_CN.yaml
index d20ac2b7a..1bdb2422c 100644
--- a/packages/hydrooj/locales/zh_CN.yaml
+++ b/packages/hydrooj/locales/zh_CN.yaml
@@ -322,7 +322,7 @@ Hidden: 隐藏
 Hide all tags: 隐藏所有标签
 Hide categorical tags: 隐藏分类标签
 Highlight discussions: 高亮讨论
-Highlight: 高亮讨论
+Highlight: 高亮
 Hint: 提示
 home_account: 账户设置
 home_domain_account: 当前域的设置
diff --git a/packages/hydrooj/locales/zh_TW.yaml b/packages/hydrooj/locales/zh_TW.yaml
index cbf25d37e..3902ec0e6 100644
--- a/packages/hydrooj/locales/zh_TW.yaml
+++ b/packages/hydrooj/locales/zh_TW.yaml
@@ -202,7 +202,7 @@ Hidden: 隱藏
 Hide all tags: 隱藏所有標籤
 Hide categorical tags: 隱藏分類標籤
 Highlight discussions: 高亮討論
-Highlight: 高亮討論
+Highlight: 高亮
 home_account: 賬戶設定
 home_domain_account: 當前域的設定
 home_domain_create: 創建域
diff --git a/packages/hydrooj/src/error.ts b/packages/hydrooj/src/error.ts
index 0b7804702..3f7d60f31 100644
--- a/packages/hydrooj/src/error.ts
+++ b/packages/hydrooj/src/error.ts
@@ -85,6 +85,7 @@ export const HomeworkNotLiveError = Err('HomeworkNotLiveError', ForbiddenError,
 export const HomeworkNotAttendedError = Err('HomeworkNotAttendedError', ForbiddenError, "You haven't claimed this homework yet.");
 export const RoleAlreadyExistError = Err('RoleAlreadyExistError', ForbiddenError, 'This role already exists.');
 export const CsrfTokenError = Err('CsrfTokenError', ForbiddenError, 'CsrfTokenError');
+export const DomainAlreadyExistsError = Err('DomainAlreadyExistsError', ForbiddenError, 'The domain {0} already exists.');
 export const DomainJoinForbiddenError = Err('DomainJoinForbiddenError', ForbiddenError, 'You are not allowed to join the domain. The link is either invalid or expired.');
 export const DomainJoinAlreadyMemberError = Err('DomainJoinAlreadyMemberError', ForbiddenError, 'Failed to join the domain. You are already a member.');
 export const InvalidJoinInvitationCodeError = Err('InvalidJoinInvitationCodeError', ForbiddenError, 'The invitation code you provided is invalid.');
@@ -136,6 +137,7 @@ global.Hydro.error = {
     ContestNotLiveError,
     ContestScoreboardHiddenError,
     ContestAlreadyAttendedError,
+    DomainAlreadyExistsError,
     DomainJoinAlreadyMemberError,
     DomainJoinForbiddenError,
     InvalidJoinInvitationCodeError,
diff --git a/packages/hydrooj/src/handler/home.ts b/packages/hydrooj/src/handler/home.ts
index 40418d222..3e13aeb28 100644
--- a/packages/hydrooj/src/handler/home.ts
+++ b/packages/hydrooj/src/handler/home.ts
@@ -1,7 +1,7 @@
 import { ObjectID } from 'mongodb';
 import {
     VerifyPasswordError, UserAlreadyExistError, InvalidTokenError,
-    NotFoundError, UserNotFoundError, PermissionError,
+    NotFoundError, UserNotFoundError, PermissionError, DomainAlreadyExistsError,
 } from '../error';
 import * as bus from '../service/bus';
 import {
@@ -292,10 +292,12 @@ class HomeDomainCreateHandler extends Handler {
     @param('bulletin', Types.String, isContent)
     @param('gravatar', Types.String, true, isEmail)
     async post(_: string, id: string, name: string, bulletin: string, gravatar: string) {
+        const doc = await domain.get(id);
+        if (doc) throw new DomainAlreadyExistsError(id);
         gravatar = gravatar || this.user.gravatar || this.user.mail || 'guest@hydro.local';
         const domainId = await domain.add(id, this.user._id, name, bulletin);
         await domain.edit(domainId, { gravatar });
-        this.response.redirect = this.url('domain_manage', { domainId });
+        this.response.redirect = this.url('domain_dashboard', { domainId });
         this.response.body = { domainId };
     }
 }