DB migration to unassign deleted tags

db/migrations/20260123123229_unassign_deleted_tags.php

@@ -0,0 +1,19 @@
+<?php
+
+use Phinx\Migration\AbstractMigration;
+
+class UnassignDeletedTags extends AbstractMigration
+{
+    public function up(): void
+    {
+        $updated_rows = $this->execute('
+            UPDATE tags_relations tr
+            INNER JOIN tags t ON t.id = tr.tag_id
+            SET tr.deleted_on = t.deleted, tr.deleted_by_id = COALESCE(t.modified_by, 1)
+            WHERE tr.deleted_on IS NULL AND t.deleted > 0
+        ');
+        $this->output->writeln('Updated rows: '.$updated_rows);
+    }
+
+    public function down(): void {}
+}