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MCU-PLUS-SDK-AM243X: Imported the project, it became different from before as below

Part Number: MCU-PLUS-SDK-AM243X

Hi Experts,

    Why after I imported the project, it became different from before? you can see posix_demo_am243x-lp_r5fss0-0_freertos_ti-arm-clang.

    But it does not affect the compilation, I am not sure if something has changed? 
    .c and .h files have question marks in the profinet_device_irt_mii_demo_am243x-evm_r5fss0-0_freertos_ti-arm-clang

    So experts do you have any dir/advice?