LoRaWan And M5 Fire hardware modification

  • I want to use the LoRaWAN module with the Fire Core.
    I am confused about the necessary hardware modifications. It says:

    • M5Stack Fire has occupied GPIO16 / 17 to connect with the PSRAM by default, it's conflict with TXD / RXD (GPIO16, GPIO17) in this module. Therefore, when using the LoRaWAN module with the M5Stack Fire, you might have to cut the TXD and RXD from GPS module and wire fly to another set of UART pin, if you gonna use the PSRAM.

    Why does it talk about a GPS module? What connections am I meant to cut? Could someone please clarify?