Cannot create clone of Aurora Serverless v1. Documentation says otherwise.

I'm tasked with upgrading an Aurora Serverless v1 DB cluster from from Aurora MySQL version 1 to Aurora MySQL version 2. According to the documentation at https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Aurora.MySQL56.EOL.html, I can perform an in-place upgrade, described in detail at https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/AuroraMySQL.Updates.MajorVersionUpgrade.html#AuroraMySQL.Updates.MajorVersionUpgrade.1to2

Before I perform the in-place upgrade, I'd like to create a clone of the current Serverless v1 cluster and test the in-place upgrade on that clone. According to the documentation at https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Aurora.Managing.Clone.html I can create an Aurora Serverless v1 clone from an Aurora Serverless v1 DB cluster. Further down in that document, a guide is shown how to do this in the AWS Console. In the Console, under RDS > Databases, it is shown that you can select a Serverless cluster and that a "Create clone" menu item will show up under the Actions drop-down menu. When I click that "Actions" button, after selecting my v1 Serverless cluster in the Console, I don't get the "Create clone" action. Has this option been removed for Serverless v1?