fix: #13397, null values in category sync list

src/upgrades/4.3.2/fix_category_sync_null_values.js

@@ -0,0 +1,12 @@
+'use strict';
+
+const db = require('../../database');
+
+module.exports = {
+	name: 'Fix null values in category synchronization list',
+	timestamp: Date.UTC(2025, 4, 8),
+	method: async () => {
+		const cids = await db.getSortedSetMembers('categories:cid');
+		await db.sortedSetsRemove(cids.map(cid => `followRequests:cid.${cid}`), 'null');
+	},
+};