Unable to flash peripheral_uart sample in nRF5340DK

I have purchased two nRF5340 development kits and I am trying to run the peripheral_uart sample using VS Code. I am unable to flash the code to the board. I have tried using nrjprog --recover but it does not seem to work. I have attached the build configuration for reference.

The SDK version is v2.6.0 and the toolchain version is also v2.6.0. I am able to flash the sample in one of my development kits but not on the other. It's a new kit and no other program has been executed. It says there is an issue since protection is enabled. Any suggestions on what could be the issue?

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