In the target environment, create a dummy SAP project before opening the transported SAP project. Alternatively, for the first time transporting a project into the new environment do so via project shell export as described here.
Development has recorded defect entries VPR#27687 and VPR#31876 and fixed the defect in version 8.1 SP1 and higher. Please note that sync projects should be transported with the "Transport of synchronization projects" mode of the transporter which was introduced in version 8.1. Using "Transport selected objects" would still result in the error described above. For earlier versions, use the workaround described in the WORKAROUND section.