diff --git a/internal/database/migrations/20260603104618_update_farm_depreciation_manual_inputs.down.sql b/internal/database/migrations/20260603104618_update_farm_depreciation_manual_inputs.down.sql
deleted file mode 100644
index e69de29b..00000000
diff --git a/internal/database/migrations/20260531213223_add_project_flock_id_to_house_depreciation_standards.down.sql b/internal/database/migrations/20260604041616_add_project_flock_id_to_house_depreciation_standards.down.sql
similarity index 100%
rename from internal/database/migrations/20260531213223_add_project_flock_id_to_house_depreciation_standards.down.sql
rename to internal/database/migrations/20260604041616_add_project_flock_id_to_house_depreciation_standards.down.sql
diff --git a/internal/database/migrations/20260531213223_add_project_flock_id_to_house_depreciation_standards.up.sql b/internal/database/migrations/20260604041616_add_project_flock_id_to_house_depreciation_standards.up.sql
similarity index 100%
rename from internal/database/migrations/20260531213223_add_project_flock_id_to_house_depreciation_standards.up.sql
rename to internal/database/migrations/20260604041616_add_project_flock_id_to_house_depreciation_standards.up.sql
diff --git a/internal/database/migrations/20260604041658_update_farm_depreciation_manual_inputs.down.sql b/internal/database/migrations/20260604041658_update_farm_depreciation_manual_inputs.down.sql
new file mode 100644
index 00000000..48e4ff1a
--- /dev/null
+++ b/internal/database/migrations/20260604041658_update_farm_depreciation_manual_inputs.down.sql
@@ -0,0 +1,14 @@
+-- Reverse UPSERT: hapus baris PFK 47 & 48 yang kemungkinan baru diinsert oleh up migration ini.
+-- Jika sebelumnya sudah ada (ON CONFLICT DO UPDATE), baris ini akan terhapus —
+-- restore manual dari backup jika diperlukan.
+DELETE FROM farm_depreciation_manual_inputs
+WHERE project_flock_id IN (47, 48);
+
+-- UPDATE rows untuk PFK 4–27 tidak bisa di-reverse secara presisi:
+-- nilai total_cost sebelum migration ini tidak tersimpan di migration history
+-- (data awal di-load via cmd/import-farm-depreciation-manual-inputs dari Excel).
+-- PFK 10 dan 11 tidak berubah (nilai sama dengan state dari migration 20260529144559).
+-- Jika perlu rollback penuh: restore dari database backup atau re-import Excel lama.
+
+-- Recompute snapshots setelah rollback
+TRUNCATE TABLE farm_depreciation_snapshots;
diff --git a/internal/database/migrations/20260603104618_update_farm_depreciation_manual_inputs.up.sql b/internal/database/migrations/20260604041658_update_farm_depreciation_manual_inputs.up.sql
similarity index 100%
rename from internal/database/migrations/20260603104618_update_farm_depreciation_manual_inputs.up.sql
rename to internal/database/migrations/20260604041658_update_farm_depreciation_manual_inputs.up.sql
diff --git a/internal/database/migrations/20260604041743_fix_hds_custom_unique_per_flock.down.sql b/internal/database/migrations/20260604041743_fix_hds_custom_unique_per_flock.down.sql
new file mode 100644
index 00000000..dd4dface
--- /dev/null
+++ b/internal/database/migrations/20260604041743_fix_hds_custom_unique_per_flock.down.sql
@@ -0,0 +1,8 @@
+DROP INDEX IF EXISTS idx_hds_custom_unique;
+
+-- Remove all per-flock custom curves; they must be re-seeded after rolling back.
+DELETE FROM house_depreciation_standards WHERE project_flock_ids IS NOT NULL;
+
+CREATE UNIQUE INDEX idx_hds_custom_unique
+    ON house_depreciation_standards (house_type, day, effective_date)
+    WHERE project_flock_ids IS NOT NULL;
diff --git a/internal/database/migrations/20260604041743_fix_hds_custom_unique_per_flock.up.sql b/internal/database/migrations/20260604041743_fix_hds_custom_unique_per_flock.up.sql
new file mode 100644
index 00000000..c0310ceb
--- /dev/null
+++ b/internal/database/migrations/20260604041743_fix_hds_custom_unique_per_flock.up.sql
@@ -0,0 +1,10 @@
+-- Allow multiple custom depreciation curves per (house_type, day, effective_date)
+-- for different flock groups. Previously idx_hds_custom_unique only keyed on
+-- (house_type, day, effective_date), so separate curves for different project_flock_ids
+-- arrays on the same date were blocked.
+
+DROP INDEX IF EXISTS idx_hds_custom_unique;
+
+CREATE UNIQUE INDEX idx_hds_custom_unique
+    ON house_depreciation_standards (house_type, day, effective_date, project_flock_ids)
+    WHERE project_flock_ids IS NOT NULL;
diff --git a/internal/database/migrations/20260603173610_seed_house_depreciation_flocks_8_13_17.down.sql b/internal/database/migrations/20260604041941_seed_house_depreciation_flocks_8_13_17.down.sql
similarity index 100%
rename from internal/database/migrations/20260603173610_seed_house_depreciation_flocks_8_13_17.down.sql
rename to internal/database/migrations/20260604041941_seed_house_depreciation_flocks_8_13_17.down.sql
diff --git a/internal/database/migrations/20260603173610_seed_house_depreciation_flocks_8_13_17.up.sql b/internal/database/migrations/20260604041941_seed_house_depreciation_flocks_8_13_17.up.sql
similarity index 97%
rename from internal/database/migrations/20260603173610_seed_house_depreciation_flocks_8_13_17.up.sql
rename to internal/database/migrations/20260604041941_seed_house_depreciation_flocks_8_13_17.up.sql
index 5c4a5ec4..6af1fd3b 100644
--- a/internal/database/migrations/20260603173610_seed_house_depreciation_flocks_8_13_17.up.sql
+++ b/internal/database/migrations/20260604041941_seed_house_depreciation_flocks_8_13_17.up.sql
@@ -3,6 +3,12 @@
 -- depreciation_percent diturunkan = (1 - multiplication_percentage) * 100.
 -- Lookup engine: ? = ANY(project_flock_ids) — satu baris dipakai semua flock.
 
+-- Hapus custom curve untuk array ini agar INSERT idempoten.
+DELETE FROM house_depreciation_standards
+WHERE project_flock_ids = ARRAY[8,13,17]::bigint[]
+  AND house_type = 'open_house'::house_type_enum
+  AND effective_date = DATE '2026-06-03';
+
 INSERT INTO house_depreciation_standards
     (project_flock_ids, house_type, day, effective_date,
      multiplication_percentage, depreciation_percent, standard_week, name)
diff --git a/internal/database/migrations/20260603181020_seed_house_depreciation_flocks_18.down.sql b/internal/database/migrations/20260604042051_seed_house_depreciation_flocks_18.down.sql
similarity index 100%
rename from internal/database/migrations/20260603181020_seed_house_depreciation_flocks_18.down.sql
rename to internal/database/migrations/20260604042051_seed_house_depreciation_flocks_18.down.sql
diff --git a/internal/database/migrations/20260603181020_seed_house_depreciation_flocks_18.up.sql b/internal/database/migrations/20260604042051_seed_house_depreciation_flocks_18.up.sql
similarity index 97%
rename from internal/database/migrations/20260603181020_seed_house_depreciation_flocks_18.up.sql
rename to internal/database/migrations/20260604042051_seed_house_depreciation_flocks_18.up.sql
index 15fbea96..79a1f191 100644
--- a/internal/database/migrations/20260603181020_seed_house_depreciation_flocks_18.up.sql
+++ b/internal/database/migrations/20260604042051_seed_house_depreciation_flocks_18.up.sql
@@ -3,6 +3,12 @@
 -- depreciation_percent diturunkan = (1 - multiplication_percentage) * 100.
 -- Lookup engine: ? = ANY(project_flock_ids) — satu baris dipakai semua flock.
 
+-- Hapus custom curve untuk array ini agar INSERT idempoten.
+DELETE FROM house_depreciation_standards
+WHERE project_flock_ids = ARRAY[18,14,12,15,9,19]::bigint[]
+  AND house_type = 'open_house'::house_type_enum
+  AND effective_date = DATE '2026-06-03';
+
 INSERT INTO house_depreciation_standards
     (project_flock_ids, house_type, day, effective_date,
      multiplication_percentage, depreciation_percent, standard_week, name)
diff --git a/internal/database/migrations/20260603204029_seed_house_depreciation_flocks_26.down.sql b/internal/database/migrations/20260604042912_seed_house_depreciation_flocks_26.down.sql
similarity index 100%
rename from internal/database/migrations/20260603204029_seed_house_depreciation_flocks_26.down.sql
rename to internal/database/migrations/20260604042912_seed_house_depreciation_flocks_26.down.sql
diff --git a/internal/database/migrations/20260603204029_seed_house_depreciation_flocks_26.up.sql b/internal/database/migrations/20260604042912_seed_house_depreciation_flocks_26.up.sql
similarity index 97%
rename from internal/database/migrations/20260603204029_seed_house_depreciation_flocks_26.up.sql
rename to internal/database/migrations/20260604042912_seed_house_depreciation_flocks_26.up.sql
index da494675..0ca7d389 100644
--- a/internal/database/migrations/20260603204029_seed_house_depreciation_flocks_26.up.sql
+++ b/internal/database/migrations/20260604042912_seed_house_depreciation_flocks_26.up.sql
@@ -3,6 +3,12 @@
 -- depreciation_percent diturunkan = (1 - multiplication_percentage) * 100.
 -- Lookup engine: ? = ANY(project_flock_ids) — satu baris dipakai semua flock.
 
+-- Hapus custom curve untuk array ini agar INSERT idempoten.
+DELETE FROM house_depreciation_standards
+WHERE project_flock_ids = ARRAY[26]::bigint[]
+  AND house_type = 'close_house'::house_type_enum
+  AND effective_date = DATE '2026-06-03';
+
 -- house_type: close_house
 INSERT INTO house_depreciation_standards
     (project_flock_ids, house_type, day, effective_date,
diff --git a/internal/database/migrations/20260603204147_seed_house_depreciation_flocks_20.down.sql b/internal/database/migrations/20260604043007_seed_house_depreciation_flocks_20.down.sql
similarity index 100%
rename from internal/database/migrations/20260603204147_seed_house_depreciation_flocks_20.down.sql
rename to internal/database/migrations/20260604043007_seed_house_depreciation_flocks_20.down.sql
diff --git a/internal/database/migrations/20260603204147_seed_house_depreciation_flocks_20.up.sql b/internal/database/migrations/20260604043007_seed_house_depreciation_flocks_20.up.sql
similarity index 97%
rename from internal/database/migrations/20260603204147_seed_house_depreciation_flocks_20.up.sql
rename to internal/database/migrations/20260604043007_seed_house_depreciation_flocks_20.up.sql
index 90655d6f..fb37bff4 100644
--- a/internal/database/migrations/20260603204147_seed_house_depreciation_flocks_20.up.sql
+++ b/internal/database/migrations/20260604043007_seed_house_depreciation_flocks_20.up.sql
@@ -3,6 +3,12 @@
 -- depreciation_percent diturunkan = (1 - multiplication_percentage) * 100.
 -- Lookup engine: ? = ANY(project_flock_ids) — satu baris dipakai semua flock.
 
+-- Hapus custom curve untuk array ini agar INSERT idempoten.
+DELETE FROM house_depreciation_standards
+WHERE project_flock_ids = ARRAY[20]::bigint[]
+  AND house_type = 'open_house'::house_type_enum
+  AND effective_date = DATE '2026-06-03';
+
 -- house_type: open_house
 INSERT INTO house_depreciation_standards
     (project_flock_ids, house_type, day, effective_date,
diff --git a/internal/database/migrations/20260603205553_seed_house_depreciation_flocks_4.down.sql b/internal/database/migrations/20260604043052_seed_house_depreciation_flocks_4.down.sql
similarity index 100%
rename from internal/database/migrations/20260603205553_seed_house_depreciation_flocks_4.down.sql
rename to internal/database/migrations/20260604043052_seed_house_depreciation_flocks_4.down.sql
diff --git a/internal/database/migrations/20260603205553_seed_house_depreciation_flocks_4.up.sql b/internal/database/migrations/20260604043052_seed_house_depreciation_flocks_4.up.sql
similarity index 95%
rename from internal/database/migrations/20260603205553_seed_house_depreciation_flocks_4.up.sql
rename to internal/database/migrations/20260604043052_seed_house_depreciation_flocks_4.up.sql
index 47206e29..7f799cac 100644
--- a/internal/database/migrations/20260603205553_seed_house_depreciation_flocks_4.up.sql
+++ b/internal/database/migrations/20260604043052_seed_house_depreciation_flocks_4.up.sql
@@ -3,6 +3,12 @@
 -- depreciation_percent diturunkan = (1 - multiplication_percentage) * 100.
 -- Lookup engine: ? = ANY(project_flock_ids) — satu baris dipakai semua flock.
 
+-- Hapus custom curve untuk array ini agar INSERT idempoten.
+DELETE FROM house_depreciation_standards
+WHERE project_flock_ids = ARRAY[4]::bigint[]
+  AND house_type = 'open_house'::house_type_enum
+  AND effective_date = DATE '2026-06-03';
+
 -- house_type: open_house
 INSERT INTO house_depreciation_standards
     (project_flock_ids, house_type, day, effective_date,
diff --git a/internal/database/migrations/20260603210426_seed_house_depreciation_flocks_5.down.sql b/internal/database/migrations/20260604043132_seed_house_depreciation_flocks_5.down.sql
similarity index 100%
rename from internal/database/migrations/20260603210426_seed_house_depreciation_flocks_5.down.sql
rename to internal/database/migrations/20260604043132_seed_house_depreciation_flocks_5.down.sql
diff --git a/internal/database/migrations/20260603210426_seed_house_depreciation_flocks_5.up.sql b/internal/database/migrations/20260604043132_seed_house_depreciation_flocks_5.up.sql
similarity index 97%
rename from internal/database/migrations/20260603210426_seed_house_depreciation_flocks_5.up.sql
rename to internal/database/migrations/20260604043132_seed_house_depreciation_flocks_5.up.sql
index 1611db5a..e45312cc 100644
--- a/internal/database/migrations/20260603210426_seed_house_depreciation_flocks_5.up.sql
+++ b/internal/database/migrations/20260604043132_seed_house_depreciation_flocks_5.up.sql
@@ -3,6 +3,12 @@
 -- depreciation_percent diturunkan = (1 - multiplication_percentage) * 100.
 -- Lookup engine: ? = ANY(project_flock_ids) — satu baris dipakai semua flock.
 
+-- Hapus custom curve untuk array ini agar INSERT idempoten.
+DELETE FROM house_depreciation_standards
+WHERE project_flock_ids = ARRAY[5]::bigint[]
+  AND house_type = 'open_house'::house_type_enum
+  AND effective_date = DATE '2026-06-03';
+
 -- house_type: open_house
 INSERT INTO house_depreciation_standards
     (project_flock_ids, house_type, day, effective_date,
diff --git a/internal/database/migrations/20260603210841_seed_house_depreciation_flocks_6.down.sql b/internal/database/migrations/20260604043209_seed_house_depreciation_flocks_6.down.sql
similarity index 100%
rename from internal/database/migrations/20260603210841_seed_house_depreciation_flocks_6.down.sql
rename to internal/database/migrations/20260604043209_seed_house_depreciation_flocks_6.down.sql
diff --git a/internal/database/migrations/20260603210841_seed_house_depreciation_flocks_6.up.sql b/internal/database/migrations/20260604043209_seed_house_depreciation_flocks_6.up.sql
similarity index 97%
rename from internal/database/migrations/20260603210841_seed_house_depreciation_flocks_6.up.sql
rename to internal/database/migrations/20260604043209_seed_house_depreciation_flocks_6.up.sql
index 744c7119..ae57a387 100644
--- a/internal/database/migrations/20260603210841_seed_house_depreciation_flocks_6.up.sql
+++ b/internal/database/migrations/20260604043209_seed_house_depreciation_flocks_6.up.sql
@@ -3,6 +3,12 @@
 -- depreciation_percent diturunkan = (1 - multiplication_percentage) * 100.
 -- Lookup engine: ? = ANY(project_flock_ids) — satu baris dipakai semua flock.
 
+-- Hapus custom curve untuk array ini agar INSERT idempoten.
+DELETE FROM house_depreciation_standards
+WHERE project_flock_ids = ARRAY[6]::bigint[]
+  AND house_type = 'open_house'::house_type_enum
+  AND effective_date = DATE '2026-06-03';
+
 -- house_type: open_house
 INSERT INTO house_depreciation_standards
     (project_flock_ids, house_type, day, effective_date,