diff --git a/app/Classes/Modules/Bookings/ControllersLogic/UpdateBookingAmountOnHoldLogic.php b/app/Classes/Modules/Bookings/ControllersLogic/UpdateBookingAmountOnHoldLogic.php
index 80e43945..3588909f 100644
--- a/app/Classes/Modules/Bookings/ControllersLogic/UpdateBookingAmountOnHoldLogic.php
+++ b/app/Classes/Modules/Bookings/ControllersLogic/UpdateBookingAmountOnHoldLogic.php
@@ -14,6 +14,7 @@ use App\Classes\ValueObjects\Constants\TransactionType;
 use App\Classes\Exceptions\MalformedRequestException;
 use App\Classes\General\Abstracts\AbstractControllerLogic;
 use App\Classes\Modules\Accounts\DataTransferObjects\KeyValuePairObject;
+use App\Classes\ValueObjects\Constants\KVPKey;
 use App\Http\Resources\BookingResource;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
@@ -90,10 +91,8 @@ class UpdateBookingAmountOnHoldLogic extends AbstractControllerLogic
             throw new MalformedRequestException('Booking Amount cannot be less than '. $minimum_amount .'.');
         }
 
-        $key = "BOOKING_AMOUNT_UPDATE";
-
-        $keyValuePairObject = new KeyValuePairObject($key, $input_amount);
-        $metadata = $booking->attributesKVP()->where('key', $key)->first();
+        $keyValuePairObject = new KeyValuePairObject(KVPKey::BOOKING_AMOUNT_UPDATE, $input_amount);
+        $metadata = $booking->attributesKVP()->where('key', KVPKey::BOOKING_AMOUNT_UPDATE)->first();
         if($metadata){
             $this->updatesKeyValuePair->execute($metadata, $keyValuePairObject);
         }
diff --git a/app/Classes/Modules/Bookings/ControllersLogic/UpdateBookingAmountWithPOLogic.php b/app/Classes/Modules/Bookings/ControllersLogic/UpdateBookingAmountWithPOLogic.php
index b97a2667..48cc7d94 100644
--- a/app/Classes/Modules/Bookings/ControllersLogic/UpdateBookingAmountWithPOLogic.php
+++ b/app/Classes/Modules/Bookings/ControllersLogic/UpdateBookingAmountWithPOLogic.php
@@ -14,6 +14,7 @@ use App\Classes\Modules\Bookings\Services\UpdatesBookingInvoiceStatus;
 use App\Classes\Modules\Transactions\Processors\CreateInvoiceTransactionV2Processor;
 use App\Classes\Modules\Bookings\DataTransferObjects\UpdateBookingInvoiceStatusObject;
 use App\Classes\ValueObjects\Constants\ApprovalStatus;
+use App\Classes\ValueObjects\Constants\KVPKey;
 use App\Classes\ValueObjects\Constants\TransactionType;
 use App\Http\Resources\BookingResource;
 use App\Models\Booking;
@@ -88,7 +89,7 @@ class UpdateBookingAmountWithPOLogic extends AbstractControllerLogic
         /** @var Booking $booking */
         $booking = $this->fetchesBooking->execute(['id' => $request->route('id') ?? $id]);
         $outstandingAmount = $this->calculatesBookingOutstanding->execute($booking);
-        $bookingAttribute = $booking->attributesKVP()->where('key', "BOOKING_AMOUNT_UPDATE")->first();
+        $bookingAttribute = $booking->attributesKVP()->where('key', KVPKey::BOOKING_AMOUNT_UPDATE)->first();
 
 
         // cief todo: 90 - BEFORE REVERT
diff --git a/app/Classes/ValueObjects/Constants/KVPKey.php b/app/Classes/ValueObjects/Constants/KVPKey.php
index 0eebe6bc..1ab5f1bd 100644
--- a/app/Classes/ValueObjects/Constants/KVPKey.php
+++ b/app/Classes/ValueObjects/Constants/KVPKey.php
@@ -28,6 +28,6 @@ class KVPKey
 
     public const AUTOCOUNT_DOCNO_SALES_DEPOSIT_BY_WALLET_REFUND = 'AUTOCOUNT_DOCNO_SALES_DEPOSIT_BY_WALLET_RF';
 
-
+    public const BOOKING_AMOUNT_UPDATE =  'BOOKING_AMOUNT_UPDATE';
 
 }