SAP Message /ISDFPS/UPS_ASSET023 - Data error: equipment &, material &, serial number &

Diagnosis
In the source system, the UPS object represents a material/serialnumber; no equipment view is available for this object in this system.
However, in the target system, the UPS object is already defined as acomplete piece of equipment and therefore cannot be posted here.

Procedure
Check the data in the source and target systems.