Document Set custom content type - welcome page missing

<?xml version="1.0" encoding="utf-8"?><Elements xmlns="http://schemas.microsoft.com/sharepoint/"><Field ID="{B9B7D98D-A2D3-4191-9B30-C516C8EDD9F4}" DisplayName="Fieldpr41" Name="Fieldpr41" Type="Note" RichText="false" NumLines="3" Group="pr41" Overwrite="TRUE" /><!-- Parent ContentType: Document Set (0x0120D520) --><ContentType ID="0x0120D5200062FEFD4873814585B3EFD57010F1F8AE"
               Name="ContentType41"
               Group="Custom Content Types"
               Description="My Content Type"
               Inherits="FALSE"
               ProgId="SharePoint.DocumentSet"
               Version="0"><FieldRefs><FieldRef ID="{B9B7D98D-A2D3-4191-9B30-C516C8EDD9F4}" DisplayName="Fieldpr41" Name="Fieldpr41" /></FieldRefs><XmlDocuments><XmlDocument
    NamespaceURI="http://schemas.microsoft.com/office/documentsets/welcomepagefields"><wpFields:WelcomePageFields
        xmlns:wpFields="http://schemas.microsoft.com/office/documentsets/welcomepagefields"
        LastModified="1/1/2010 08:00:00 AM"><WelcomePageField id="83729202-DCA7-4BF8-A75B-56DDDE53189C" /></wpFields:WelcomePageFields></XmlDocument></XmlDocuments></ContentType></Elements>