make flash-sdcard can not create partitions. (Tried with multiple microSD cards)

HI there team, I am trying to build Ariane on a Gensys2 board. I have built the images successfully and spike simulation works with the image. I just have problems when trying to flash the images into the two partitions on an sd card. basically, the partitions do not get created with "sudo -E make flash-sdcard SDDEVICE=/dev/sdb"

the final command is: sgdisk --clear -g --new=1:2048:6909 --new:2:512M:0 --typecode=1:3000 --typecode=2:8300 /dev/sdb

the error is : could not create partition 1 from 2048 to 6909 could not create partition 2 from 1048576 to 2014 could not change partition 1's type code to 3000 could not change partition 2's type code to 8300 Error encountered not saving changes. [makefile:142 format-sd ] Error4

I tried with new microSDs from different vendors and still the same problem arises. Any Ideas?