Cant unset a mutli option custom field

Trying to unset a custom multi option field using
v2/persons/{id}
Payload:
{ "custom_fields": {"key":[]} }

It says
{
“success”: false,
“error”: “Validation failed: custom_fields: Expected non-empty ‘array’ as value for multi options custom field”,
“code”: “ERR_SCHEMA_VALIDATION_FAILED”
}

but i dont want to select any field. this was possible in v1. How can i do this?

Hey, please try setting the multi option custom field to null instead of an empty array to remove its values.