diff --git a/db/migrations/20260123123229_unassign_deleted_tags.php b/db/migrations/20260123123229_unassign_deleted_tags.php
new file mode 100644
index 00000000..fb2e950f
--- /dev/null
+++ b/db/migrations/20260123123229_unassign_deleted_tags.php
@@ -0,0 +1,17 @@
+<?php
+
+use Phinx\Migration\AbstractMigration;
+
+class UnassignDeletedTags extends AbstractMigration
+{
+    public function change(): 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 = 1
+            WHERE tr.deleted_on IS NULL AND t.deleted > 0
+        ');
+        $this->output->writeln('Updated rows: '.$updated_rows);
+    }
+}