diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 2b337f69d..0757cdea4 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "3.17.5",
+    "version": "3.17.6",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",
diff --git a/packages/hydrooj/src/handler/contest.ts b/packages/hydrooj/src/handler/contest.ts
index 5fc21d469..2a51d19ef 100644
--- a/packages/hydrooj/src/handler/contest.ts
+++ b/packages/hydrooj/src/handler/contest.ts
@@ -119,7 +119,7 @@ export class ContestDetailHandler extends ContestDetailBaseHandler {
         this.response.template = 'contest_detail.html';
         const udict = await user.getList(domainId, [this.tdoc.owner]);
         this.response.body = {
-            tdoc: this.tdoc, tsdoc: this.tsdoc, udict,
+            tdoc: this.tdoc, tsdoc: pick(this.tsdoc, ['attend', 'startAt']), udict,
         };
         if (!this.request.json) {
             this.response.body.tdoc.content = this.response.body.tdoc.content
diff --git a/packages/hydrooj/src/handler/problem.ts b/packages/hydrooj/src/handler/problem.ts
index fb105402c..95a394a43 100644
--- a/packages/hydrooj/src/handler/problem.ts
+++ b/packages/hydrooj/src/handler/problem.ts
@@ -2,7 +2,7 @@ import AdmZip from 'adm-zip';
 import { readFile, statSync } from 'fs-extra';
 import { isBinaryFile } from 'isbinaryfile';
 import {
-    escapeRegExp, flattenDeep, intersection, isSafeInteger,
+    escapeRegExp, flattenDeep, intersection, isSafeInteger, pick,
 } from 'lodash';
 import { FilterQuery, ObjectID } from 'mongodb';
 import { nanoid } from 'nanoid';
@@ -372,12 +372,12 @@ export class ProblemDetailHandler extends ContestDetailBaseHandler {
         this.response.body = {
             pdoc: this.pdoc,
             udoc: this.udoc,
-            psdoc: this.psdoc,
+            psdoc: tid ? null : this.psdoc,
             title: this.pdoc.title,
             solutionCount: scnt,
             discussionCount: dcnt,
             tdoc: this.tdoc,
-            tsdoc: this.tsdoc,
+            tsdoc: pick(this.tsdoc, ['attend', 'startAt']),
         };
         this.response.template = 'problem_detail.html';
         this.UiContext.extraTitleContent = this.pdoc.title;
@@ -429,8 +429,10 @@ export class ProblemDetailHandler extends ContestDetailBaseHandler {
             if (this.psdoc?.rid) {
                 this.response.body.rdoc = await record.get(this.args.domainId, this.psdoc.rid);
             }
-            this.response.body.ctdocs = await contest.getRelated(this.args.domainId, this.pdoc.docId);
-            this.response.body.htdocs = await contest.getRelated(this.args.domainId, this.pdoc.docId, 'homework');
+            [this.response.body.ctdocs, this.response.body.htdocs] = await Promise.all([
+                contest.getRelated(this.args.domainId, this.pdoc.docId),
+                contest.getRelated(this.args.domainId, this.pdoc.docId, 'homework'),
+            ]);
         }
     }
 
diff --git a/packages/hydrooj/src/interface.ts b/packages/hydrooj/src/interface.ts
index dc2fde7f5..55f57244e 100644
--- a/packages/hydrooj/src/interface.ts
+++ b/packages/hydrooj/src/interface.ts
@@ -495,12 +495,16 @@ export interface ContestRule<T = any> {
     TEXT: string;
     hidden?: boolean;
     check: (args: any) => any;
-    statusSort: any;
+    statusSort: Record<string, 1 | -1>;
     submitAfterAccept: boolean;
     showScoreboard: (tdoc: Tdoc<30>, now: Date) => boolean;
     showSelfRecord: (tdoc: Tdoc<30>, now: Date) => boolean;
     showRecord: (tdoc: Tdoc<30>, now: Date) => boolean;
     stat: (this: ContestRule<T>, tdoc: Tdoc<30>, journal: any[], ignoreLock?: boolean) => ContestStat & T;
+    scoreboardHeader: (
+        this: ContestRule<T>, isExport: boolean, _: (s: string) => string,
+        tdoc: Tdoc<30>, pdict: ProblemDict,
+    ) => Promise<ScoreboardRow>;
     scoreboard: (
         this: ContestRule<T>, isExport: boolean, _: (s: string) => string,
         tdoc: Tdoc<30>, pdict: ProblemDict, cursor: Cursor<ContestStat & T>, page: number,
diff --git a/packages/hydrooj/src/model/contest.ts b/packages/hydrooj/src/model/contest.ts
index 8f77c6ef8..9a45d2a1f 100644
--- a/packages/hydrooj/src/model/contest.ts
+++ b/packages/hydrooj/src/model/contest.ts
@@ -1,3 +1,4 @@
+import { sumBy } from 'lodash';
 import { FilterQuery, ObjectID } from 'mongodb';
 import { Counter, formatSeconds, Time } from '@hydrooj/utils/lib/utils';
 import {
@@ -79,10 +80,7 @@ const acm = buildContestRule({
         }
         return { accept, time, detail };
     },
-    async scoreboard(isExport, _, tdoc, pdict, cursor, page) {
-        const [rankedTsdocs, nPages] = await ranked(cursor, (a, b) => a.score === b.score && a.time === b.time, page);
-        const uids = rankedTsdocs.map(([, tsdoc]) => tsdoc.uid);
-        const udict = await user.getList(tdoc.domainId, uids);
+    async scoreboardHeader(isExport, _, tdoc, pdict) {
         const columns: ScoreboardRow = [
             { type: 'rank', value: '#' },
             { type: 'user', value: _('User') },
@@ -110,7 +108,12 @@ const acm = buildContestRule({
                 });
             }
         }
-
+        return columns;
+    },
+    async scoreboard(isExport, _, tdoc, pdict, cursor, page) {
+        const [rankedTsdocs, nPages] = await ranked(cursor, (a, b) => a.score === b.score && a.time === b.time, page);
+        const uids = rankedTsdocs.map(([, tsdoc]) => tsdoc.uid);
+        const udict = await user.getList(tdoc.domainId, uids);
         // Find first accept
         const first = {};
         const data = await document.collStatus.aggregate([
@@ -130,6 +133,7 @@ const acm = buildContestRule({
         ]).toArray();
         for (const t of data) first[t._id] = t.first.generationTime;
 
+        const columns = await this.scoreboardHeader(isExport, _, tdoc, pdict);
         const rows: ScoreboardRow[] = [columns];
         for (const [rank, tsdoc] of rankedTsdocs) {
             const tsddict: Record<number, AcmDetail> = {};
@@ -197,10 +201,7 @@ const oi = buildContestRule({
     showScoreboard: (tdoc, now) => now > tdoc.endAt,
     showSelfRecord: (tdoc, now) => now > tdoc.endAt,
     showRecord: (tdoc, now) => now > tdoc.endAt,
-    async scoreboard(isExport, _, tdoc, pdict, cursor, page) {
-        const [rankedTsdocs, nPages] = await ranked(cursor, (a, b) => a.score === b.score, page);
-        const uids = rankedTsdocs.map(([, tsdoc]) => tsdoc.uid);
-        const udict = await user.getList(tdoc.domainId, uids);
+    async scoreboardHeader(isExport, _, tdoc, pdict) {
         const columns: ScoreboardNode[] = [
             { type: 'rank', value: '#' },
             { type: 'user', value: _('User') },
@@ -221,6 +222,12 @@ const oi = buildContestRule({
                 });
             }
         }
+        return columns;
+    },
+    async scoreboard(isExport, _, tdoc, pdict, cursor, page) {
+        const [rankedTsdocs, nPages] = await ranked(cursor, (a, b) => a.score === b.score, page);
+        const uids = rankedTsdocs.map(([, tsdoc]) => tsdoc.uid);
+        const udict = await user.getList(tdoc.domainId, uids);
         const psdict = {};
         const first = {};
         for (const pid of tdoc.pids) {
@@ -243,6 +250,7 @@ const oi = buildContestRule({
                 }
             }
         }
+        const columns = await this.scoreboardHeader(isExport, _, tdoc, pdict);
         const rows: ScoreboardNode[][] = [columns];
         for (const [rank, tsdoc] of rankedTsdocs) {
             const tsddict = {};
@@ -250,7 +258,7 @@ const oi = buildContestRule({
                 if (!tsddict[item.pid] || tsddict[item.pid].score < item.score || this.submitAfterAccept) tsddict[item.pid] = item;
             }
             const row: ScoreboardNode[] = [
-                { type: 'string', value: rank.toString() },
+                { type: 'rank', value: rank.toString() },
                 { type: 'user', value: udict[tsdoc.uid].uname, raw: tsdoc.uid },
             ];
             if (isExport) row.push({ type: 'email', value: udict[tsdoc.uid].mail });
@@ -337,8 +345,8 @@ const homework = buildContestRule({
             });
         }
         return {
-            score: Math.sum(detail.map((d) => d.score)),
-            penaltyScore: Math.sum(detail.map((d) => d.penaltyScore)),
+            score: sumBy(detail, 'score'),
+            penaltyScore: sumBy(detail, 'penaltyScore'),
             time: Math.sum(detail.map((d) => d.time)),
             detail,
         };
@@ -346,10 +354,7 @@ const homework = buildContestRule({
     showScoreboard: () => true,
     showSelfRecord: () => true,
     showRecord: () => true,
-    async scoreboard(isExport, _, tdoc, pdict, cursor, page) {
-        const [rankedTsdocs, nPages] = await ranked(cursor, (a, b) => a.score === b.score, page);
-        const uids = rankedTsdocs.map(([, tsdoc]) => tsdoc.uid);
-        const udict = await user.getList(tdoc.domainId, uids);
+    async scoreboardHeader(isExport, _, tdoc, pdict) {
         const columns: ScoreboardNode[] = [
             { type: 'rank', value: _('Rank') },
             { type: 'user', value: _('User') },
@@ -384,6 +389,13 @@ const homework = buildContestRule({
                 });
             }
         }
+        return columns;
+    },
+    async scoreboard(isExport, _, tdoc, pdict, cursor, page) {
+        const [rankedTsdocs, nPages] = await ranked(cursor, (a, b) => a.score === b.score, page);
+        const uids = rankedTsdocs.map(([, tsdoc]) => tsdoc.uid);
+        const udict = await user.getList(tdoc.domainId, uids);
+        const columns = await this.scoreboardHeader(isExport, _, tdoc, pdict);
         const rows: ScoreboardRow[] = [columns];
         for (const [rank, tsdoc] of rankedTsdocs) {
             const tsddict = {};
@@ -391,7 +403,7 @@ const homework = buildContestRule({
                 if (!tsddict[item.pid] || tsddict[item.pid].score <= item.score) tsddict[item.pid] = item;
             }
             const row: ScoreboardRow = [
-                { type: 'string', value: rank },
+                { type: 'rank', value: rank.toString() },
                 {
                     type: 'user',
                     value: udict[tsdoc.uid].uname,
diff --git a/packages/hydrooj/src/pipelineUtils.ts b/packages/hydrooj/src/pipelineUtils.ts
index dca71fbb7..eb78eacdd 100644
--- a/packages/hydrooj/src/pipelineUtils.ts
+++ b/packages/hydrooj/src/pipelineUtils.ts
@@ -2,8 +2,9 @@
 import { FilterQuery } from 'mongodb';
 import type {
     DomainDoc, ProblemStatusDoc, RecordDoc,
-    Udoc,
+    Tdoc, Udoc,
 } from './interface';
+import * as contest from './model/contest';
 import * as document from './model/document';
 import domain from './model/domain';
 import problem, { Field, ProblemDoc } from './model/problem';
@@ -20,6 +21,15 @@ export async function iterateAllUser(cb: (udoc: Udoc, current?: number, total?:
     for (const i in udocs) await cb(udocs[i], +i, udocs.length);
 }
 
+export async function iterateAllContest(cb: (tdoc: Tdoc) => Promise<any>) {
+    await iterateAllDomain(async (ddoc) => {
+        const tdocs = await contest.getMulti(ddoc._id, {}).toArray();
+        for (const tdoc of tdocs) {
+            await cb(tdoc);
+        }
+    });
+}
+
 export async function iterateAllPsdoc(filter: FilterQuery<ProblemStatusDoc>, cb: (psdoc: ProblemStatusDoc) => Promise<any>) {
     await iterateAllDomain(async ({ _id: domainId }) => {
         const cursor = document.getMultiStatus(domainId, document.TYPE_PROBLEM, filter);
diff --git a/packages/hydrooj/src/upgrade.ts b/packages/hydrooj/src/upgrade.ts
index 8f19538b5..b773a6f47 100644
--- a/packages/hydrooj/src/upgrade.ts
+++ b/packages/hydrooj/src/upgrade.ts
@@ -831,6 +831,7 @@ const scripts: UpgradeScript[] = [
         return true;
     },
     async function _67_78() {
+        const _FRESH_INSTALL_IGNORE = 1;
         const rdocs = RecordModel.coll.find({ code: /^@@hydro_submission_file@@/ });
         let rdoc;
         while (rdoc = await rdocs.next()) { // eslint-disable-line
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index c98758210..3f637e82f 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.40.5",
+  "version": "4.40.6",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",
diff --git a/packages/ui-default/templates/contest_scoreboard.html b/packages/ui-default/templates/contest_scoreboard.html
index 1024708fa..253b29b0a 100644
--- a/packages/ui-default/templates/contest_scoreboard.html
+++ b/packages/ui-default/templates/contest_scoreboard.html
@@ -30,7 +30,7 @@
           <tr>
           {%- for column in rows[0] -%}
             <th class="col--{{ column.type }}">
-            {% if column.type == 'problem' %}
+            {% if column.type == 'problem' and column.raw %}
               <a href="{{ url('problem_detail', pid=column.raw, query={tid:tdoc.docId}) }}" data-tooltip="{{ pdict[column.raw].title }}">
                 {{ column.value }}<br />{{ pdict[column.raw].nAccept }}/{{ pdict[column.raw].nSubmit }}
               </a>