How to use only one channel on ADC port Max10

I have an ADC core

component adc_qsys is
	port (
		adc_1_command_valid          : in  std_logic                     := '0';             --  adc_1_command.valid
		adc_1_command_channel        : in  std_logic_vector(4 downto 0)  := (others => '0'); --               .channel
		adc_1_command_startofpacket  : in  std_logic                     := '0';             --               .startofpacket
		adc_1_command_endofpacket    : in  std_logic                     := '0';             --               .endofpacket
		adc_1_command_ready          : out std_logic;                                        --               .ready
		adc_1_response_valid         : out std_logic;                                        -- adc_1_response.valid
		adc_1_response_channel       : out std_logic_vector(4 downto 0);                     --               .channel
		adc_1_response_data          : out std_logic_vector(11 downto 0);                    --               .data
		adc_1_response_startofpacket : out std_logic;                                        --               .startofpacket
		adc_1_response_endofpacket   : out std_logic;                                        --               .endofpacket
		clk_clk                      : in  std_logic                     := '0';             --            clk.clk
		reset_reset_n                : in  std_logic                     := '0'              --          reset.reset_n
	);
end component adc_qsys;


U_ADC_SYS : adc_qsys 
port map 
(
	clk_clk        => s_pll_clk_10M, 
	reset_reset_n  => '1', 
	
	adc_1_command_valid          => adc1_com_valid, 
	adc_1_command_channel        => adc1_com_channel, 
	adc_1_command_startofpacket  => adc1_com_startofpacket,
	adc_1_command_endofpacket    => adc1_com_endofpacket, 
	adc_1_command_ready          => adc1_com_ready,
	adc_1_response_valid         => adc1_resp_valid,
	adc_1_response_channel       => adc1_resp_channel,
	adc_1_response_data          => adc1_resp_data, 
	adc_1_response_startofpacket => adc1_resp_startofpacket,
	adc_1_response_endofpacket   => adc1_resp_endofpacket
);

When I used the whole port ADC1_IN1 - ADC1_IN8 was no problem.

Now I want to use only one channel - ADC1_IN1 so I set only CH1 active in the core.

 

However I get the errors while compiling

Error (176310): Can't place multiple pins assigned to pin location Pin_7 (IOPAD_X0_Y37_N21)
Info (176311): Pin LED_CMD[5] is assigned to pin location Pin_7 (IOPAD_X0_Y37_N21)
Info (176311): Pin ~ALTERA_ADC1IN2~ is assigned to pin location Pin_7 (IOPAD_X0_Y37_N21)
Error (176310): Can't place multiple pins assigned to pin location Pin_8 (IOPAD_X0_Y36_N14)
Info (176311): Pin LED_CMD[6] is assigned to pin location Pin_8 (IOPAD_X0_Y36_N14)
Info (176311): Pin ~ALTERA_ADC1IN3~ is assigned to pin location Pin_8 (IOPAD_X0_Y36_N14)
Error (176310): Can't place multiple pins assigned to pin location Pin_10 (IOPAD_X0_Y36_N21)
Info (176311): Pin LED_CMD[7] is assigned to pin location Pin_10 (IOPAD_X0_Y36_N21)
Info (176311): Pin ~ALTERA_ADC1IN4~ is assigned to pin location Pin_10 (IOPAD_X0_Y36_N21)
Error (176310): Can't place multiple pins assigned to pin location Pin_11 (IOPAD_X0_Y35_N14)
Info (176311): Pin LED_CMD[8] is assigned to pin location Pin_11 (IOPAD_X0_Y35_N14)
Info (176311): Pin ~ALTERA_ADC1IN5~ is assigned to pin location Pin_11 (IOPAD_X0_Y35_N14)
Error (176310): Can't place multiple pins assigned to pin location Pin_12 (IOPAD_X0_Y35_N21)
Info (176311): Pin LED_CMD[9] is assigned to pin location Pin_12 (IOPAD_X0_Y35_N21)
Info (176311): Pin ~ALTERA_ADC1IN6~ is assigned to pin location Pin_12 (IOPAD_X0_Y35_N21)
Error (176310): Can't place multiple pins assigned to pin location Pin_13 (IOPAD_X0_Y34_N14)
Info (176311): Pin LED_TEST is assigned to pin location Pin_13 (IOPAD_X0_Y34_N14)
Info (176311): Pin ~ALTERA_ADC1IN7~ is assigned to pin location Pin_13 (IOPAD_X0_Y34_N14)
Error (176310): Can't place multiple pins assigned to pin location Pin_14 (IOPAD_X0_Y34_N21)
Info (176311): Pin LED_FLTn is assigned to pin location Pin_14 (IOPAD_X0_Y34_N21)
Info (176311): Pin ~ALTERA_ADC1IN8~ is assigned to pin location Pin_14 (IOPAD_X0_Y34_N21)

How can I resolve the problem?