fix: Missing retention's `ignoreThreads` param for old channels (#33028)

.changeset/gold-knives-sparkle.md

+---
+'@rocket.chat/meteor': patch
+---
+
+Fixes an issue where ignore threads parameter were not being affected by retention policy overriding in old channels

apps/meteor/server/startup/migrations/index.ts

@@ -38,5 +38,6 @@ import './v301';
 import './v303';
 import './v304';
 import './v305';
+import './v306';
 
 export * from './xrun';

apps/meteor/server/startup/migrations/v306.ts

+import { Rooms } from '@rocket.chat/models';
+
+import { addMigration } from '../../lib/migrations';
+
+addMigration({
+	version: 306,
+	name: 'Adds missing ignoreThreads parameter for old rooms with retention policy overridden',
+	async up() {
+		await Rooms.updateMany(
+			{
+				'retention.enabled': true,
+				'retention.overrideGlobal': true,
+				'retention.ignoreThreads': { $exists: false },
+			},
+			{
+				$set: {
+					'retention.ignoreThreads': false,
+				},
+			},
+		);
+	},
+});