/home/hans/esp/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.2.0/../../../../xtensa-esp32-elf/bin/ld: /home/hans/git/esp32_learn/esp32/build/hans_mfrc522/libhans_mfrc522.a(rc522.o): /home/hans/git/esp32_learn/esp32/components/hans_mfrc522/include/rc522.h:18: multiple definition of `rc522_timer_running'; /home/hans/git/esp32_learn/esp32/build/main/libmain.a(esp32.o): /home/hans/git/esp32_learn/esp32/components/hans_mfrc522/include/rc522.h:18: first defined herecollect2: error: ld returned 1 exit status/home/hans/esp/esp-idf/make/project.mk:524: recipe for target '/home/hans/git/esp32_learn/esp32/build/esp32.elf' failedmake: *** [/home/hans/git/esp32_learn/esp32/build/esp32.elf] Error 1