Remove previously generated .dtb files on the BeagleBone ai

I'm trying to remove previously generated .dtb files on the BeagleBone-ai the name of my old file is "am5729-beagleboneai-custom.dtb"I did1) sudo rm /boot/dtbs/am5729-beagleboneai-custom.dtb2) copied my new generated .dtb file "am5729-custom.dtb" to /boot/dtbs3) ls /boot/dtbs to check if my new file is existed and it was there4) Edit my /boot/uEnv.txt to #dtb=am5729-custom.dtb5) reboot 6) after rebooting, I did "show-pins" and still seeing the old results for my "am5729-beagleboneai-custom.dtb"I'm not sure what should I do to stop getting the results from my old '.dtb' file.Thank you for your help.