Product definition covers all versions, but license agreement covers a specific version or subset of product versions

In case, you purchased a license for Microsoft SQL Server Enterprise Edition without Software Assurance and this license allows you to install only Microsoft SQL Server 2019 Enterprise Edition. BigFix Inventory contains one product definition that groups all versions of Microsoft SQL Server.

In such case you need to create a product definition in ‘Products & Metrics’ for Microsoft SQL Server 2019 Enterprise Edition and assign to it an applicable license metric.

Once the product is created, you need to add this product to a contract.

Classify all discovered components of Microsoft SQL Server 2019 Enterprise Edition to the newly created product and assigned metric (note that you can use Custom Rules for that job to automate action) and add this product to your contract in BigFix Inventory.