Error: Can't place multiple pins assigned to pin location Pin_162

Error: Can't place multiple pins assigned to pin location Pin_162 (IOPAD_X41_Y19_N14)
        Info: Pin outp_38 is assigned to pin location Pin_162 (IOPAD_X41_Y19_N14)
        Info: Pin ~ALTERA_nCEO~ is assigned to pin location Pin_162 (IOPAD_X41_Y19_N14)
求解？