Sort GPT partitions in Linux with gdisk (command s)

I have tried to sort my partitions to change the order, but when I try to use 's' command of gdisk, this waing appears:

"You may need to edit /etc/fstab and/or your boot loader configuration!"

And it doesn't let me use the command. What can I do to sort the partitions? (I can't use fdisk).

Thank you!