diff --git a/packages/hydrooj/locales/en.yaml b/packages/hydrooj/locales/en.yaml
index 7b5d4bde8..45ec86366 100644
--- a/packages/hydrooj/locales/en.yaml
+++ b/packages/hydrooj/locales/en.yaml
@@ -60,7 +60,6 @@ problem_detail: Problem Detail
 problem_edit: Problem Edit
 problem_import: Import Problem
 problem_main: Problem Set
-problem_settings: Problem Settings
 problem_solution: Problem Solution
 problem_statistics: Problem Statistics
 problem_submit: Problem Submit
diff --git a/packages/hydrooj/locales/ko.yaml b/packages/hydrooj/locales/ko.yaml
index 2c6c55ec4..386adccde 100644
--- a/packages/hydrooj/locales/ko.yaml
+++ b/packages/hydrooj/locales/ko.yaml
@@ -525,7 +525,6 @@ problem_create: 문제 만들기
 problem_edit: 문제 수정
 problem_import: 문제 가져오기
 problem_main: 문제
-problem_settings: 문제 설정
 problem_solution: 문제 해설
 problem_statistics: 문제 통계
 problem_submit: 제출
diff --git a/packages/hydrooj/locales/zh.yaml b/packages/hydrooj/locales/zh.yaml
index cad1fc3b6..7ca97a393 100644
--- a/packages/hydrooj/locales/zh.yaml
+++ b/packages/hydrooj/locales/zh.yaml
@@ -540,7 +540,6 @@ problem_files: 题目文件
 problem_import_syzoj: 从 SYZOJ 导入题目
 problem_import: 导入题目
 problem_main: 题库
-problem_settings: 题目设置
 problem_solution: 题解
 problem_statistics: 题目统计
 problem_submit: 递交代码
diff --git a/packages/hydrooj/locales/zh_TW.yaml b/packages/hydrooj/locales/zh_TW.yaml
index 0dce065fb..2392851c0 100644
--- a/packages/hydrooj/locales/zh_TW.yaml
+++ b/packages/hydrooj/locales/zh_TW.yaml
@@ -344,7 +344,6 @@ Problem Tags Visibility: 題目標籤可見性
 problem_create: 創建題目
 problem_edit: 編輯題目
 problem_main: 題庫
-problem_settings: 題目設定
 problem_solution: 題解
 problem_submit: 遞交程式碼
 Problem: 題目
diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 91b74b104..f051c38d4 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.20.7",
+    "version": "2.20.8",
     "bin": "bin/hydrooj.js",
     "main": "dist/loader.js",
     "typings": "dist/loader.d.ts",
diff --git a/packages/hydrooj/src/handler/import.syzoj.ts b/packages/hydrooj/src/handler/import.syzoj.ts
index c953d9d74..065de5aff 100644
--- a/packages/hydrooj/src/handler/import.syzoj.ts
+++ b/packages/hydrooj/src/handler/import.syzoj.ts
@@ -246,11 +246,11 @@ class ProblemImportSYZOJHandler extends Handler {
                     protocol, host, pid, false,
                 );
                 this.response.body = { pid: targetPid || docId };
-                this.response.redirect = this.url('problem_settings', { pid: targetPid || docId });
+                this.response.redirect = this.url('problem_files', { pid: targetPid || docId });
             } else {
                 const docId = await this.v2(domainId, targetPid, hidden, url);
                 this.response.body = { pid: targetPid || docId };
-                this.response.redirect = this.url('problem_settings', { pid: targetPid || docId });
+                this.response.redirect = this.url('problem_files', { pid: targetPid || docId });
             }
         }
     }
diff --git a/packages/hydrooj/src/handler/problem.ts b/packages/hydrooj/src/handler/problem.ts
index 0798af2f3..b2f0b4561 100644
--- a/packages/hydrooj/src/handler/problem.ts
+++ b/packages/hydrooj/src/handler/problem.ts
@@ -552,17 +552,17 @@ export class ProblemCreateHandler extends Handler {
 
     @post('title', Types.String, isTitle)
     @post('content', Types.String, isContent)
-    @post('pid', Types.String, isPid, true)
+    @post('pid', Types.String, true, isPid)
     @post('hidden', Types.Boolean)
     @post('tag', Types.String, true, null, parseCategory)
     async post(domainId: string, title: string, content: string, pid: string, hidden = false, tag: string[] = []) {
         try {
             content = JSON.parse(content);
         } catch { /* Ignore */ }
-        if (await problem.get(domainId, pid)) throw new BadRequestError('invalid pid');
+        if (pid && await problem.get(domainId, pid)) throw new BadRequestError('invalid pid');
         const docId = await problem.add(domainId, pid, title, content, this.user._id, tag, hidden);
         this.response.body = { pid: pid || docId };
-        this.response.redirect = this.url('problem_settings', { pid: pid || docId });
+        this.response.redirect = this.url('problem_files', { pid: pid || docId });
     }
 }
 
diff --git a/packages/hydrooj/src/model/token.ts b/packages/hydrooj/src/model/token.ts
index 9d5dfc04a..8adcebca1 100644
--- a/packages/hydrooj/src/model/token.ts
+++ b/packages/hydrooj/src/model/token.ts
@@ -21,19 +21,18 @@ function ensureIndexes() {
 }
 
 export async function add(
-    tokenType: number, expireSeconds: number, data: any,
+    tokenType: number, expireSeconds: number, data: any, id = String.random(32),
 ): Promise<[string, TokenDoc]> {
     const now = new Date();
-    const str = String.random(32);
     const res = await coll.insertOne({
         ...data,
-        _id: str,
+        _id: id,
         tokenType,
         createAt: now,
         updateAt: now,
         expireAt: new Date(now.getTime() + expireSeconds * 1000),
     });
-    return [str, res.ops[0]];
+    return [id, res.ops[0]];
 }
 
 export async function get(tokenId: string, tokenType: number): Promise<TokenDoc | null> {