diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 4de8f5eb1..81a7d920e 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.20.45",
+    "version": "2.20.46",
     "bin": "bin/hydrooj.js",
     "main": "dist/loader.js",
     "typings": "dist/loader.d.ts",
diff --git a/packages/hydrooj/src/handler/discussion.ts b/packages/hydrooj/src/handler/discussion.ts
index e32663bc4..3feca7f4e 100644
--- a/packages/hydrooj/src/handler/discussion.ts
+++ b/packages/hydrooj/src/handler/discussion.ts
@@ -343,8 +343,8 @@ class DiscussionEditHandler extends DiscussionHandler {
     ) {
         if (this.ddoc.owner !== this.user._id) this.checkPerm(PERM.PERM_EDIT_DISCUSSION);
         else this.checkPerm(PERM.PERM_EDIT_DISCUSSION_SELF);
-        if (highlight !== this.ddoc.highlight) this.checkPerm(PERM.PERM_HIGHLIGHT_DISCUSSION);
-        if (pin !== this.ddoc.pin) this.checkPerm(PERM.PERM_PIN_DISCUSSION);
+        if (!this.user.hasPerm(PERM.PERM_HIGHLIGHT_DISCUSSION)) highlight = this.ddoc.highlight;
+        if (!this.user.hasPerm(PERM.PERM_PIN_DISCUSSION)) pin = this.ddoc.pin;
         await discussion.edit(domainId, did, title, content, highlight, pin);
         this.response.body = { did };
         this.response.redirect = this.url('discussion_detail', { did });
diff --git a/packages/hydrooj/src/upgrade.ts b/packages/hydrooj/src/upgrade.ts
index ba2b1d568..031571077 100644
--- a/packages/hydrooj/src/upgrade.ts
+++ b/packages/hydrooj/src/upgrade.ts
@@ -227,6 +227,11 @@ const scripts: UpgradeScript[] = [
         await db.collection('domain.user').updateMany({ role: 'admin' }, { $set: { role: 'root' } });
         return true;
     },
+    async function _14_15() {
+        const _FRESH_INSTALL_IGNORE = 1;
+        await db.collection('domain.user').deleteMany({ uid: null });
+        await db.collection('domain.user').deleteMany({ uid: 0 });
+    },
 ];
 
 export = scripts;