Discount currency doesn't match the transaction

{
  "error": {
    "type": "request_error",
    "code": "transaction_invalid_discount_currency",
    "detail": "Flat discounts must be in the same currency as the transaction. Discount currency: EUR, Transaction currency: USD",
    "documentation_url": "https://developer.paddle.com/errors/transactions/transaction_invalid_discount_currency"
  },
  "meta": {
    "request_id": "00000000-0000-0000-0000-000000000000"
  }
}

Details

Status code

400

Error code

transaction_invalid_discount_currency

Error message

Flat discounts must be in the same currency as the transaction. Discount currency: %s, Transaction currency: %s

Common causes

• The discount has a fixed amount (a flat or per_seat discount) in a currency that differs from the transaction's currency. Fixed-amount discounts must match the transaction currency.

Troubleshooting

• Apply a discount whose currency matches the transaction's currency.
• Use a percentage discount, which applies regardless of currency.