Minimal
POST /variants/12345/transfer
{
"variant": {
"new_product_id": "123" // Required
}
}
When the options need to be changed to match the new product
POST /variants/12345/transfer
{
"variant": {
"new_product_id": "123", // Required
"new_opt1": "Red", // Optional
"new_opt2": "Large", // Optional
"new_opt3": "Roundish" // Optional
}
}