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 003d89a..ef7ddc5 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
@@ -228,7 +228,7 @@ select st_studium_nr,
          (case when studiengang_nr =1 then studiengang_nr
         else 
         dense_rank () over (partition by semester, st_studstamm_nr,studiengang_nr  order by 
-         (case when studiengangs_typ_kb='TSG' then st_absz_nr else st_studium_nr end ))+1
+         (case when studiengangs_typ_kb='TSG' then st_studiengang_nr_msg  else st_studium_nr end ))+1
          end)
   as studiengang_nr,
 --AP Code: