Time stamp issue in nrf52811

I am currently working on direction finding using the nRF Connect SDK in VS Code. I am using an nRF52811 custom board, and my logs work properly. I wanted to include timestamps to see the log in real-time, but when I include this in prj.conf, it shows an error. Is there another configuration in prj.conf to enable logs with timestamps

CONFIG_LOG=y
CONFIG_LOG_TIMESTAMP_64BIT=y
CONFIG_LOG_BACKEND_FORMAT_TIMESTAMP=y

CONFIG_USE_SEGGER_RTT=y
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG=y
CONFIG_LOG_PRINTK=y

CONFIG_LOG_USES_TIMESTAMP=y

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