2 files changed, 25 insertions, 1 deletions

diff --git a/server/initializers/constants.ts b/server/initializers/constants.ts
index 7beaca238..a9f7a8e58 100644
--- a/server/initializers/constants.ts
+++ b/server/initializers/constants.ts
@@ -24,7 +24,7 @@ import { CONFIG, registerConfigChangedHandler } from './config'
 
 // ---------------------------------------------------------------------------
 
-const LAST_MIGRATION_VERSION = 570
+const LAST_MIGRATION_VERSION = 575
 
 // ---------------------------------------------------------------------------
 
diff --git a/server/initializers/migrations/0575-duplicate-thumbnail.ts b/server/initializers/migrations/0575-duplicate-thumbnail.ts
new file mode 100644
index 000000000..4dbbe71d4
--- /dev/null
+++ b/server/initializers/migrations/0575-duplicate-thumbnail.ts
@@ -0,0 +1,24 @@
+import * as Sequelize from 'sequelize'
+
+async function up (utils: {
+  transaction: Sequelize.Transaction
+  queryInterface: Sequelize.QueryInterface
+  sequelize: Sequelize.Sequelize
+  db: any
+}): Promise<void> {
+  {
+    const query = 'DELETE FROM "thumbnail" s1 ' +
+      'USING (SELECT MIN(id) as id, "filename", "type" FROM "thumbnail" GROUP BY "filename", "type" HAVING COUNT(*) > 1) s2 ' +
+      'WHERE s1."filename" = s2."filename" AND s1."type" = s2."type" AND s1.id <> s2.id'
+    await utils.sequelize.query(query)
+  }
+}
+
+function down (options) {
+  throw new Error('Not implemented.')
+}
+
+export {
+  up,
+  down
+}