diff --git a/src/main/java/com/ffii/fpsms/modules/stock/entity/StockInLine.kt b/src/main/java/com/ffii/fpsms/modules/stock/entity/StockInLine.kt
index 6ce0170..443d83e 100644
--- a/src/main/java/com/ffii/fpsms/modules/stock/entity/StockInLine.kt
+++ b/src/main/java/com/ffii/fpsms/modules/stock/entity/StockInLine.kt
@@ -69,10 +69,14 @@ open class StockInLine : BaseEntity<Long>() {
     @JoinColumn(name = "userId")
     open var user: User? = null
 
-    @OneToOne
+    @ManyToOne
     @JoinColumn(name = "inventoryLotId")
     open var inventoryLot: InventoryLot? = null
 
+    @OneToOne
+    @JoinColumn(name = "inventoryLotLineId")
+    open var inventoryLotLine: InventoryLotLine? = null
+
     @Column(name = "lotNo")
     open var lotNo: String? = null
 
diff --git a/src/main/java/com/ffii/fpsms/modules/stock/service/StockInLineService.kt b/src/main/java/com/ffii/fpsms/modules/stock/service/StockInLineService.kt
index 4fd6e6f..adc2a40 100644
--- a/src/main/java/com/ffii/fpsms/modules/stock/service/StockInLineService.kt
+++ b/src/main/java/com/ffii/fpsms/modules/stock/service/StockInLineService.kt
@@ -251,6 +251,7 @@ open class StockInLineService(
                 this.status = request.status
                 this.expiryDate = stockInLine.expiryDate ?: request.expiryDate
                 this.inventoryLot = stockInLine.inventoryLot ?: savedInventoryLot
+                this.inventoryLotLine = savedInventoryLotLine
                 this.lotNo = stockInLine.lotNo ?: savedInventoryLot?.lotNo
             }
             val savedStockInLine = saveAndFlush(stockInLine)
@@ -320,6 +321,7 @@ open class StockInLineService(
                 this.acceptedQty = request.acceptedQty
                 this.status = request.status
                 this.inventoryLot = savedInventoryLot ?: stockInLine.inventoryLot
+                this.inventoryLotLine = savedInventoryLotLine
                 this.lotNo = savedInventoryLot?.lotNo ?: stockInLine.lotNo
                 this.expiryDate = stockInLine.expiryDate ?: request.expiryDate
                 this.productLotNo = stockInLine.productLotNo ?: request.productLotNo
diff --git a/src/main/resources/db/changelog/changes/20250620_01_derek/01_add_lot_line_id_to_stock_in_line.sql b/src/main/resources/db/changelog/changes/20250620_01_derek/01_add_lot_line_id_to_stock_in_line.sql
new file mode 100644
index 0000000..15b065b
--- /dev/null
+++ b/src/main/resources/db/changelog/changes/20250620_01_derek/01_add_lot_line_id_to_stock_in_line.sql
@@ -0,0 +1,7 @@
+-- liquibase formatted sql
+-- changeset derek:add_lot_line_id_to_stock_in_line
+
+ALTER TABLE `stock_in_line`
+    ADD COLUMN `inventoryLotLineId` INT(11) NULL AFTER `inventoryLotId`,
+    ADD CONSTRAINT FK_STOCK_IN_LINE_ON_LOT_LINE_ID FOREIGN KEY (inventoryLotLineId) REFERENCES inventory_lot_line (id)
+;
\ No newline at end of file