diff --git a/database/migrations/2025_03_23_170155_create_production_quantities_table.php b/database/migrations/2025_03_23_170155_create_production_quantities_table.php
index 62019e9a3..e5db962bd 100644
--- a/database/migrations/2025_03_23_170155_create_production_quantities_table.php
+++ b/database/migrations/2025_03_23_170155_create_production_quantities_table.php
@@ -20,13 +20,13 @@ return new class extends Migration
                 plant_id			BIGINT NOT NULL,
                 item_id			    BIGINT NOT NULL,
 
-                serial_number		TEXT NOT NULL UNIQUE,
+                serial_number		TEXT NOT NULL,
 
                 created_at			TIMESTAMP NOT NULL DEFAULT NOW(),
                 updated_at			TIMESTAMP NOT NULL DEFAULT NOW(),
                 deleted_at			TIMESTAMP,
 
-                UNIQUE (item_id, serial_number),
+                UNIQUE (plant_id, serial_number),
                 FOREIGN KEY (item_id) REFERENCES items (id),
                 FOREIGN KEY (line_id) REFERENCES lines (id),
                 FOREIGN KEY (shift_id) REFERENCES shifts (id),