diff --git a/ecs/jskult-batch/src/batch/trn_result_data_bio_lot.py b/ecs/jskult-batch/src/batch/trn_result_data_bio_lot.py
index ba08ea30..652d82f1 100644
--- a/ecs/jskult-batch/src/batch/trn_result_data_bio_lot.py
+++ b/ecs/jskult-batch/src/batch/trn_result_data_bio_lot.py
@@ -158,7 +158,7 @@ class TrnResultDataBioLot(JskultBatchEntrypoint):
                 bio.edit_whlslr_org_cd AS edit_whlslr_org_cd,
                 bio.orig_univ_product_cd AS orig_univ_product_cd,
                 bio.edit_deal_div_cd AS edit_deal_div_cd,
-                bio.cnvs_sales_dt AS cnvs_sales_dt,
+                bio.cnvs_sales_dt AS cnvs_sales_dt, -- datetime → date
                 bio.orig_slip_no AS orig_slip_no,
                 bio.orig_prod_nm AS orig_prod_nm,
                 bio.edit_endusr_cd AS edit_endusr_cd,
@@ -170,7 +170,7 @@ class TrnResultDataBioLot(JskultBatchEntrypoint):
                     WHEN 2 THEN bio.cnvs_lot_no_2
                     WHEN 3 THEN bio.cnvs_lot_no_3
                 END AS cnvs_lot_no,
-                bio.load_dt AS load_dt,
+                bio.load_dt AS load_dt, -- datetime → date
                 bio.cnvs_deal_div_cd AS cnvs_deal_div_cd,
                 bio.cls_deal_div_nm AS cls_deal_div_nm,
                 bio.cnvs_depo_cd AS cnvs_depo_cd,
@@ -290,7 +290,7 @@ class TrnResultDataBioLot(JskultBatchEntrypoint):
              ON  bio.cnvs_prod_cd = cla.material_cd
              AND bio.cnvs_lot_no = cla.lot_no_txt
             SET
-                bio.expr_dt = cla.ck_last_dt_txt
+                bio.expr_dt = STR_TO_DATE(cla.ck_last_dt_txt, '%Y%m%d')
             """
             db.execute(sql)
         except Exception as e: