compiling SEGGER_RTT_Syscalls_KEIL.c...

[amey877]

I am using nrf52833dk and download nRF5_SDK_17.0.2_d674dde when i build then code of RF52-Bluetooth- Course the following error occur:

asBuild target 'nrf52840_xxaa'
compiling SEGGER_RTT_Syscalls_KEIL.c...
linking...
._build\nrf52840_xxaa.axf: Error: L6200E: Symbol __stdout_name multiply defined (by sys_io.o and segger_rtt_syscalls_keil.o).
._build\nrf52840_xxaa.axf: Error: L6200E: Symbol __stderr_name multiply defined (by sys_io.o and segger_rtt_syscalls_keil.o).
._build\nrf52840_xxaa.axf: Error: L6200E: Symbol _sys_close multiply defined (by sys_io.o and segger_rtt_syscalls_keil.o).
._build\nrf52840_xxaa.axf: Error: L6200E: Symbol _sys_ensure multiply defined (by sys_io.o and segger_rtt_syscalls_keil.o).
._build\nrf52840_xxaa.axf: Error: L6200E: Symbol _sys_flen multiply defined (by sys_io.o and segger_rtt_syscalls_keil.o).
._build\nrf52840_xxaa.axf: Error: L6200E: Symbol _sys_istty multiply defined (by sys_io.o and segger_rtt_syscalls_keil.o).
._build\nrf52840_xxaa.axf: Error: L6200E: Symbol _sys_open multiply defined (by sys_io.o and segger_rtt_syscalls_keil.o).
._build\nrf52840_xxaa.axf: Error: L6200E: Symbol _sys_read multiply defined (by sys_io.o and segger_rtt_syscalls_keil.o).
._build\nrf52840_xxaa.axf: Error: L6200E: Symbol _sys_seek multiply defined (by sys_io.o and segger_rtt_syscalls_keil.o).
._build\nrf52840_xxaa.axf: Error: L6200E: Symbol _sys_write multiply defined (by sys_io.o and segger_rtt_syscalls_keil.o).
Not enough information to list image symbols.
Not enough information to list load addresses in the image map.
Finished: 2 information, 0 warning and 10 error messages.
"._build\nrf52840_xxaa.axf" - 10 Error(s), 0 Warning(s).
Target not created.

please give any suggestion how to minimize these error .