EmbeddedPriceDraftImport key field changing from optional to required

To enhance the performance and reliability of the Import API, we are changing the key field on EmbeddedPriceDraftImport from optional to required.

This change will take effect on 31 July 2023*. From this date, you must include a key when importing Prices using EmbeddedPriceDraftImport.

*The original date of this change was 11 July 2023. The date was extended to provide users with additional time to make necessary updates to accommodate this change.