detach all likes on non-comment posts.

extensions/likes/migrations/2024_10_18_000000_detach_likes_from_non_comment_posts.php

@@ -0,0 +1,24 @@
+<?php
+
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
+use Illuminate\Database\Schema\Builder;
+
+return [
+    'up' => function (Builder $schema) {
+        // Detach likes on non-comment posts
+        $schema->getConnection()
+            ->table('post_likes')
+            ->whereNotExists(function ($query) {
+                $query->selectRaw(1)->from('posts')->whereColumn('id', 'post_id')->where('type', 'comment');
+            })
+            ->delete();
+    },
+    'down' => function (Builder $schema) {
+    }
+];