Deploy To Azure Fail

My first attempt at using SQL Management Studio 2012 Deploy to Azure failed with...

One or more unsupported elements were found in the schema used as part of a data package.
Error SQL71564: The element Extended Property: [dbo].[Asset].[Asset$CatalogId].[MS_SSMA_SOURCE] is not supported when used as part of a data package (.bacpac file).
Error SQL71564: The element Extended Property: [dbo].[Asset].[Asset$Identifier].[MS_SSMA_SOURCE] is not supported when used as part of a data package (.bacpac file).
Error SQL71564: The element Extended Property: [dbo].[Asset].[Asset$InstallerPersonId].[MS_SSMA_SOURCE]is not supported when used as part of a data package (.bacpac file).

How to fix ?