API Mutation Item link column

UPDATE

I realised that I was using the wrong mutation method so I changed “change_simple_column_value” to “change_column_value”

However, I’m now getting the following:
{
“error_code”: “ColumnValueException”,
“status_code”: 200,
“error_message”: “This column type is not supported yet in the api”,
“error_data”: {
“column_type”: “DependencyColumn”
}
}

I thought reading this article ([Released] Link to Item Column Update - #31 by dipro) that this feature is now available. I’m really confused, can anyone help?