diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 5efc0ef6d..eb01a9ce8 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.15.29",
+    "version": "2.15.30",
     "bin": "bin/hydrooj.js",
     "main": "dist/loader.js",
     "typings": "dist/loader.d.ts",
diff --git a/packages/hydrooj/src/handler/record.ts b/packages/hydrooj/src/handler/record.ts
index d458f189f..7051a34b6 100644
--- a/packages/hydrooj/src/handler/record.ts
+++ b/packages/hydrooj/src/handler/record.ts
@@ -82,14 +82,14 @@ class RecordDetailHandler extends RecordHandler {
             problem.get(domainId, rdoc.pid),
             user.getById(domainId, rdoc.uid),
         ]);
+        if (!(pdoc && this.user.hasPerm(PERM.PERM_VIEW_PROBLEM))) {
+            pdoc = problem.Pdoc.create(pdoc?.docId || 0, pdoc?.pid || '*');
+        }
         if (!rdoc.contest && pdoc.hidden && pdoc.owner !== this.user._id) {
             if (!this.user.hasPerm(PERM.PERM_VIEW_PROBLEM_HIDDEN)) {
                 pdoc = problem.Pdoc.create(pdoc.docId, pdoc.pid);
             }
         }
-        if (!this.user.hasPerm(PERM.PERM_VIEW_PROBLEM)) {
-            pdoc = problem.Pdoc.create(pdoc.docId, pdoc.pid);
-        }
         this.response.body = {
             path: [
                 ['Hydro', 'homepage'],
diff --git a/packages/hydrooj/src/script/problemStat.ts b/packages/hydrooj/src/script/problemStat.ts
index 6bd007140..dd909a268 100644
--- a/packages/hydrooj/src/script/problemStat.ts
+++ b/packages/hydrooj/src/script/problemStat.ts
@@ -30,18 +30,22 @@ export async function run() {
     ];
     const bulk = db.collection('document').initializeUnorderedBulkOp();
     db.collection('record').aggregate(pipeline).each(
-        (err, adoc: any) => bulk.find({
-            domainId: adoc._id.domainId,
-            docType: document.TYPE_PROBLEM,
-            docId: adoc._id.pid,
-        }).updateOne({
-            $set: {
-                nSubmit: adoc.nSubmit,
-                nAccept: adoc.nAccept,
-            },
-        }),
+        (err, adoc: any) => {
+            if (adoc) {
+                bulk.find({
+                    domainId: adoc._id.domainId,
+                    docType: document.TYPE_PROBLEM,
+                    docId: adoc._id.pid,
+                }).updateOne({
+                    $set: {
+                        nSubmit: adoc.nSubmit,
+                        nAccept: adoc.nAccept,
+                    },
+                });
+            }
+        },
     );
-    await bulk.execute();
+    if (bulk.length) await bulk.execute();
 }
 
 export const validate = {};
diff --git a/packages/hydrooj/src/script/rating.ts b/packages/hydrooj/src/script/rating.ts
index 503ee5d83..f4b528a57 100644
--- a/packages/hydrooj/src/script/rating.ts
+++ b/packages/hydrooj/src/script/rating.ts
@@ -128,7 +128,8 @@ async function runInDomain(domainId: string, isSub: boolean, report: Function) {
     for (const dudoc of dudocs) {
         deltaudict[dudoc.uid] = dudoc.rpdelta || 0;
     }
-    const contests = await contest.getMulti(domainId, { rated: true }).sort('endAt', -1).toArray();
+    const contests = await contest.getMulti(domainId, { rated: true })
+        .sort('endAt', -1).toArray();
     await report({ message: `Found ${contests.length} contests in ${domainId}` });
     for (const i in contests) {
         const tdoc = contests[i];