diff --git a/server/migrations/20211111191000-remove-pl-opensubtitles.js b/server/migrations/20211111191000-remove-pl-opensubtitles.js
new file mode 100644
index 00000000..d3f83cd0
--- /dev/null
+++ b/server/migrations/20211111191000-remove-pl-opensubtitles.js
@@ -0,0 +1,18 @@
+"use strict";
+
+// https://discourse.mozilla.org/t/sentence-collector-copyright-issues/52767/46
+
+module.exports = {
+  up: async (queryInterface) => {
+    await queryInterface.sequelize.query(`
+      DELETE FROM Sentences WHERE (
+        localeId="pl" AND (
+          source LIKE "%opensubtitles.org%" OR
+          source="open subtitles" OR
+          source="opensubtitles and project gutenberg"
+        )
+      )
+    `);
+  },
+  down: () => Promise.resolve(),
+};