Fix #4045

resources/lang/en_US/validation.php

@@ -139,6 +139,7 @@ return [
         'email'                   => 'email address',
         'description'             => 'description',
         'amount'                  => 'amount',
+        'transactions.*.amount'   => 'transaction amount',
         'name'                    => 'name',
         'piggy_bank_id'           => 'piggy bank ID',
         'targetamount'            => 'target amount',