diff -r 5ec5d17b5e5b -r 249126034c0e misc/migration/3.21.0_Any.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/migration/3.21.0_Any.py	Fri Jan 16 12:43:32 2015 +0100
@@ -0,0 +1,5 @@
+
+helper = repo.system_source.dbhelper
+sql('DROP INDEX entities_extid_idx')
+sql(helper.sql_create_index('entities', 'extid', True))
+commit()