Create a Campaign as WBS ele. under a Project which doesn't exist in CRM

Hello Gurus,

We are trying to create a campaign as WBS element under a project definition which does not exist in CRM system as Marketing Project.  We looked at the BADI CRM_MKTPL_R3_INT and could see that we can change the XML data in method CHANGE_XML_DATA.  But in ECC  , system is looking for GUID of  the project definition and is not able to replicate the campaign as per the requirement.  Please suggest a way to replicate Campaign as WBS element under a project definition which is not available as Marketing project in CRM but exists in ECC.

ECC system is looking for Project Definition guid in FM PR_assignments_pre_read.

Regards,

Ashwini