Pygen Error "Direct relation without source does not have a linked class" when trying to define a MultiReverseDirectRelationApply in a View.

Hi, I have defined a Data Model with a Source View having a DirectRelation to a Target View as a simplified version below, which Pygen created an SDK successfully.  But when I added a ReverseDirectRelationApply to the Target View, Pygen returned the captioned error.  Please help.

source_container = ContainerApply(

       space =”myspace”,

       external_id=”sourceContainer”,

       properties={

            “sourceName”: ContainerProperty(type=Text, name=”sourceName”),

            “target”: ContainerProperty(type=DirectRelation(is_list=False, container=ContainerId(space=”myspace”, external_id=”targetcontainer”) }

target_container = ContainerApply(

       space =”myspace”,

       external_id=”targetContainer”,

       properties={

            “targetName”: ContainerProperty(type=Text, name=”targetName”)}

source_view = ViewApply(

     space = “myspace”,

     external_id = “souceView”,

     version = “1.0”,

     properties = {

           “sourceName”: MappedPropertyApply(container=ContainerId(“myspace”, “sourceContainer”), container_property_identifier =”sourceName”),

           “target”: MappedPropertyApply(container=ContainerId(“myspace”, “sourceContainer”), container_property_identifier =”target”), source = ViewId(“myspace”, “targetView”, “1.0”) ) }

target_view = ViewApply(

     space = “myspace”,

     external_id = “targetView”,

     version = “1.0”,

     properties = {

           “targetName”: MappedPropertyApply(container=ContainerId(“myspace”, “targetContainer”), container_property_identifier =”targetName”),

           “sources”: MultiReverseDirectRelationApply(source =ViewId(“myspace”,”sourceView”, “1.0”),

                            through=PropertyId(ViewId(space=”myspace”, external_id=”sourceView”, version=”1.0”, “target”), name = “sources”))} )