Upsert Not working with the class clusters in queries

Hello ,

I added one class Customer with the two properties name and customerNo
And added the cluster for the class using below query


Also given the Unique index name in the customer vertex

As per the docs
added the upsert Query for adding and updating the customers by using the below query

UPDATE customer CLUSTER:UK_Customers SET name = “David”, customerNo =“C001”
UPSERT RETURN AFTER @rid, * WHERE customerNo =“C001”

but getting this error

Is there any workaround for UPSERT for the queries using cluster names Or is there any syntax error in above update query with UPSERT keyword