diff --git a/db/db.code.version.txt b/db/db.code.version.txt
index f04c001..64bb6b7 100644
--- a/db/db.code.version.txt
+++ b/db/db.code.version.txt
@@ -1 +1 @@
-29
+30
diff --git a/db/db.update.30.sql b/db/db.update.30.sql
new file mode 100644
index 0000000..5985f2e
--- /dev/null
+++ b/db/db.update.30.sql
@@ -0,0 +1,4 @@
+ALTER TABLE `translations` DROP INDEX `strmd5`;
+ALTER TABLE `translations` DROP INDEX `lang`;
+ALTER TABLE `translations` ADD UNIQUE KEY ( `lang`, `strmd5` );
+