Hi,
After booting imx8mqevk board with AGL 8.99.4 for journalctl logs continuously getting error imx8mqevk agetty[3975]: /dev/ttyS0: not a tty .
It is automatically trying to restart the serial-getty@ttyS0.service but it's failing state only and restarts counter is increasing continuously.

_#journalctl -f _

Jan 23 14:54:06 imx8mqevk systemd[1]: serial-getty@ttyS0.service: Service has no hold-off time (RestartSec=0), scheduling restart.
Jan 23 14:54:06 imx8mqevk systemd[1]: serial-getty@ttyS0.service: Scheduled restart job, restart counter is at 95.
Jan 23 14:54:06 imx8mqevk systemd[1]: Stopped Serial Getty on ttyS0.
Jan 23 14:54:06 imx8mqevk systemd[1]: Started Serial Getty on ttyS0.
Jan 23 14:54:06 imx8mqevk agetty[4071]: /dev/ttyS0: not a tty

I don't know why these errors are coming. Help me, please!.