Maximum number of line items reached

{
  "error": {
    "type": "request_error",
    "code": "transaction_maximum_number_of_line_items_reached",
    "detail": "Cannot add any more line items to a transaction.",
    "documentation_url": "https://developer.paddle.com/errors/transactions/transaction_maximum_number_of_line_items_reached"
  },
  "meta": {
    "request_id": "00000000-0000-0000-0000-000000000000"
  }
}