SAP Fiori - Model contains error,Contact Administrator.

HI,

Earlier we had setup Fiori landscape and apps was working fine.
Now our backed is upgraded so we are trying to re-install apps.While maintaining the services we are getting error as "Serice node is created,unable to load metadata".

When we execute the oData service then we got error as "Model 'ZLEAVEREQUEST_0002_BE' contains errors. Contact Administrator".

Earlier system alias used was different name and after upgrade we are using new system alias.

What could be the reason??

Please assist.

Regards,

Suhas.