diff --git a/app/Models/Payment/Transaction.php b/app/Models/Payment/Transaction.php
index a68d640..7051e00 100644
--- a/app/Models/Payment/Transaction.php
+++ b/app/Models/Payment/Transaction.php
@@ -269,7 +269,7 @@ class Transaction extends Model
     public function assignPaymentId(string $foreign_id): void
     {
         $foreign_id = self::getPaymentForeignKeyName($this->payment_mode, $foreign_id);
-        if ($this->attributes['foreign_id'] === $foreign_id) {
+        if (($this->attributes['foreign_id'] ?? null) === $foreign_id) {
             return;
         }
         if (!\is_numeric($this->payment_mode->value)) {
@@ -293,7 +293,7 @@ class Transaction extends Model
     public function assignRefundId(string $foreign_refund_id): void
     {
         $foreign_refund_id = self::getPaymentForeignKeyName($this->payment_mode, $foreign_refund_id);
-        if ($this->attributes['foreign_refund_id'] === $foreign_refund_id) {
+        if (($this->attributes['foreign_refund_id'] ?? null) === $foreign_refund_id) {
             return;
         }
         if (!\is_numeric($this->payment_mode->value)) {