Alias x_step_pin mapped to PC6 - can't alias to PB3

[iMattmax]

I flashed my Manta M4P with klipper and lashed the MCU with the CM4-Modul. Now, I get this error "Alias x_step_pin mapped to PC6 - can't alias to PB3" and I don't lnow how to fix this. Can someone help?

That is in the board-config-file:

WARNING. DO NOT EDIT THIS FILE.

To override settings from this file, you can copy and paste the relevant

sections into your printer.cfg and change it there.

not all aliases are set yet, but diag pins my be usefull in future (i.e detecting skipped steps on extruder)

[board_pins manta_m4p_tmc2209]
aliases:

steppers

x_step_pin=PC6, x_dir_pin=PA14, x_enable_pin=PC7, x_uart_pin=PB12, x_diag_pin=PC0, x_endstop_pin=PC0,
y_step_pin=PB10, y_dir_pin=PB2, y_enable_pin=PB11, y_uart_pin=PC10, y_diag_pin=PC1, y_endstop_pin=PC1,
z_step_pin=PB0, z_dir_pin=PC5, z_enable_pin=PB1, z_uart_pin=PC9, z_diag_pin=null,
e_step_pin=PB3, e_dir_pin=PB4, e_enable_pin=PD5, e_uart_pin=PA13, e_diag_pin=null, e_heater_pin=PC8, e_sensor_pin=PA0,

x_step_pin=PB3, x_dir_pin=PB4, x_enable_pin=PD5, x_uart_pin=PA13, x_diag_pin=PC15, x_endstop_pin=PC15,
y_step_pin=PC6, y_dir_pin=PA14, y_enable_pin=PC7, y_uart_pin=PB12, y_diag_pin=PC0, y_endstop_pin=PC0,
z_step_pin=PB10, z_dir_pin=PB2, z_enable_pin=PB11, z_uart_pin=PC10, z_diag_pin=null,
e_step_pin=PB0, e_dir_pin=PC5, e_enable_pin=PB1, e_uart_pin=PC9, e_diag_pin=null, e_heater_pin=PC8, e_sensor_pin=PA0,