diff --git a/src/sql/migrations/down/0006.sql b/src/sql/migrations/down/0006.sql
new file mode 100644
index 0000000..e69de29
diff --git a/src/sql/migrations/up/0007.sql b/src/sql/migrations/up/0007.sql
new file mode 100644
index 0000000..1c85712
--- /dev/null
+++ b/src/sql/migrations/up/0007.sql
@@ -0,0 +1,6 @@
+BEGIN;
+CREATE TABLE temp_server_alias AS SELECT * FROM server_alias GROUP BY alias;
+DROP TABLE server_alias;
+RENAME TABLE temp_server_alias TO server_alias;
+CREATE UNIQUE INDEX server_alias_alias_uindex ON server_alias (alias);
+COMMIT;