cvc-complex-type.2.4.a：从元素'MarkupListURI'开始发现无效内容。预计会出现'{MarkupDeleteURI}'之一

I have been attempting to resolve this final issue with validating the return xml from the api to the xsd, in almost all instances that are similar the solution is to add the following line: elementFormDefault="qualified" however this line is already included in both the originating xsd and the child xsd.I have been attempting to resolve this final is