GSI Installation failed on Shift 5me

Hello together, i tried to install Iode GSI Image to a Shift 5me Phone. Unfortunately the command “fastboot flash system system.img” failed with the following message:

writing “system_a” Failed (remote: “sparse image size span overflow”)
fastboot: error: Command failed

The Smartphone runs into a boot loop after restarting. Can anyone help?

The Bootloader was successfully unlocked! I followed the tutorial on this side https://blog.iode.tech/what-are-gsis-and-how-to-install-them/

Regards
Gerald