If you have a device with yourself where you are flashing GSI or using any command into your bootloader for the high level system partitions you might get the below error
Eg: remote ‘partition table doesn’t exist’
Sol : This particular problem is faced on the devices which have dynamic partitions and we have to boot into the fastbootd mode as bootloader won’t allow us to execute those commands
If you are already into the bootloader, type
fastboot reboot fastboot
Once done your device will reboot and you will be booted into the fastbootd mode and here you can use your commands like flashing or erasing system images, etc.