I need to add a new size with graphql

I need to add a new size to an existing product with graphql, I have used: productVariantsBulkCreate but it returns an error.
Can someone help me?
Thanks.

Hi @alb3rts ,

I hope you are doing well.

Can you please show more details your graphql input and error?

hi,

{
“errors”: [
{
“message”: “Internal error. Looks like something went wrong on our end.\nRequest ID: 68aa993e-0bad-4bb0-ba7e-2b0aa4b0160a-1722798991 (include this in support requests).”,
“extensions”: {
“code”: “INTERNAL_SERVER_ERROR”,
“requestId”: “68aa993e-0bad-4bb0-ba7e-2b0aa4b0160a-1722798991”
}
}
]
}