Description
Due to a problem in the Quartus® Prime software version 16.1 and earlier AXI, Avalon MM and APB Translator IPs are visible in the Quartus Prime software Qsys IP Catalog window under Qsys Interconnect / Memory-Mapped section.
Translator IPs should not be manually added to Qsys systems, Qsys will add them automatically to generate system interconnect.
Resolution
This problem is due to be fixed in a future version of the Quartus Prime software.