diff --git a/src-modules/module/costage/hilfstabellen/costage_st_studien_aggr_fuellen.sql b/src-modules/module/costage/hilfstabellen/costage_st_studien_aggr_fuellen.sql
index c862456..05a561b 100644
--- a/src-modules/module/costage/hilfstabellen/costage_st_studien_aggr_fuellen.sql
+++ b/src-modules/module/costage/hilfstabellen/costage_st_studien_aggr_fuellen.sql
@@ -188,7 +188,7 @@ delete from costage_st_studien_aggr
 --provisorisch in Testphase:
 where ${COSTAGE_STUDENT_FILTER};
 
-
+create index ix_tmp_studien2 on tmp_studien2(kz_rueck_beur_ein)
 ;
 insert into costage_st_studien_aggr(
 st_studium_nr,