In CoreMedia v11 only Commerce Adapters with version 2.x.x are supported and these adapters are not backward compatible to v10. There are several incompatible changes as described in this chapter and in "Various Commerce Hub API removals of deprecated code", "Salesforce Commerce Cloud OCAPI Changes" and "Removal of Legacy Commerce Search Facet API and Demo Content". If you use the default Commerce Adapters out of the box, you still need to consider some configuration steps mentioned in the denoted chapters. If you have customized a Commerce Adapter in version 10, you need to adapt to the new API in your customization code.