Hi I am getting this error but I already verified that "Existing Order" type does have the order_id field. What could be wrong?
{
"description": "Validation failed",
"errors": [
{
"field": "custom_fields.order_id",
"message": "It cannot be set, when the type is of value 'Existing Order'",
"code": "incompatible_field"
}
]
}