Problem:
you make a change in the fstab file and after reboot the systm you can see that your raspberry pi don't boot and show the next message:
"You are in emergency mode. After logging in, type "journalctl -xb" to view system logs, "systemctl reboot" to reboot, "systemctl default" or ^D to try again to boot into default mode.
Cannot open acess to console, the root account is locked.
See sulogin(8) man page for more details.
Press Enter to continue"
but, you can't do nothing to skip this message.
Solution:
the solution is to edit fstab system file and remove the last change or remove all and leave it with default values, follow the instruction that Talha Sariyürek explain in this blog post:
https://talhasariyuerek.com/en/linux-raspberry-pi-3b3b4-emergency-mode-root-account-locked-solution/