How to avoid duplicate output log if I want to enable early logging to uart and shell for logging?

[dennisjw]

Hi
I am running Zephyr shell in my MCU firmware, and thus, I am using shell for logging, CONFIG_SHELL_LOG_BACKEND. However, I would like to obtain early logging messages prior to shell is available, so I have also enabled CONFIG_LOG_BACKEND_UART. However, this would cause all log messages in shell to be printed twice. So it seems like I can't have CONFIG_LOG_BACKEND_UART and CONFIG_SHELL_LOG_BACKEND at the same time. Would like to know what would be the proper way to enable early log and also use shell for logging without duplicate log
Thanks!