systemctl start mountusb.service error

[Liveucoin]

iam getting following error?

systemctl start mountusb.service

[root@localhost ~]# systemctl status mountusb.service
● mountusb.service - otp-pi
Loaded: loaded (/usr/lib/systemd/system/mountusb.service; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Sun 2023-06-18 18:17:09 UTC; 11s ago
Process: 1972 ExecStart=/bin/bash /var/otp-pi/mountusb.sh (code=exited, status=32)
Main PID: 1972 (code=exited, status=32)

Jun 18 18:17:09 localhost systemd[1]: Started otp-pi.
Jun 18 18:17:09 localhost bash[1972]: mount: no medium found on /dev/sda
Jun 18 18:17:09 localhost bash[1972]: mount: special device /dev/sdb does not exist
Jun 18 18:17:09 localhost bash[1972]: mount: special device /dev/sdc does not exist
Jun 18 18:17:09 localhost bash[1972]: mount: special device /dev/sdd does not exist
Jun 18 18:17:09 localhost systemd[1]: mountusb.service: main process exited, code=exited, status=32/n/a
Jun 18 18:17:09 localhost systemd[1]: Unit mountusb.service entered failed state.
Jun 18 18:17:09 localhost systemd[1]: mountusb.service failed.