Hi Suratha,
it looks like issue with PI mapping. PI consultant has to map the fields in the configuration which make sure the message is compatible with the target system. for example, in source system Name has three fields, First Name, Middle Name, Last Name but in the target system only two fields exists First Name, Last Name means PI consultant and functional team has to decide how to map this in target system.
The error clearly tells, issue with mapping. Kindly ask PI team to cross verify.
Thanks,
Pradeep