Actually its updating all the other fields including the OOTB fields but only the manager id is not getting updated.
<NikuDataBus xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../xsd/nikuxog_read.xsd">
<Header action="write" externalSource="NIKU" objectType="project" version="14.3.0.298"/>
<Projects>
<Project
name="Test Project for Xog" projectID="FCPA1201935" managerResourceID="scl303" description="Common template for Prospect creation. Replace with project description">
</Project>
</Projects>
</NikuDataBus>
Output I am getting is
<?xml version="1.0" encoding="UTF-8"?>
<XOGOutput xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../xsd/status.xsd">
<Object type="project"/>
<Status elapsedTime="1.245 seconds" state="SUCCESS"/>
<Statistics failureRecords="0" insertedRecords="0" totalNumberOfRecords="1" updatedRecords="1"/>
</XOGOutput>