problem of nrf configuration

i m using nrf5340 cutom board, so i m using rtt logging method using jliink rtt viewer , to see logs .

so, when i am going to project section at top in embedded segger studio,

then i select -->config nrf connect sdk project, to enable rtt libraries,

after this as i click on configure button to set the configuration, it shows this message(screenshot below).

Note:- i m using sdk version 1.9.1

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