amazon ec2 – Unable to mount a volume on an ec2 instance

We apologize in advance for any incorrect / mute wording; I am extremely new to all this.

I lost the private key of an EC2 instance that I had previously executed and I am trying to follow the instructions listed in the "Connecting to your Linux Instance if you lose your private key" section. in the link below. In short, it tells me to create a temporary instance using the same AMI as the original instance, and then "from the temporary instance, mount the volume you attached to it. 39, instance in order to access its file system ".

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-key-pairs.html#having-ec2-create-your-key-pair

I got up at 9c:

Ubuntu @[ip]: ~ $ lsblk
NAME SHIFT: MIN RM SIZE RO TYPE MOUNTPOINT
xvda 202: 0 0 8G 0 disk
Vxvda1 202: 1 0 8G 0 part /
xvdf 202: 80 0 8G 0 disk
Xvdf1 202: 81 0 8G 0 part
loop0 7: 0 0 12.7M 1 loop / snapshot / amazon-ssm-agent / 495
loop1 7: 1 0 87.9M 1 loop / snap / kernel / 5328

Ubuntu @[ip]: ~ $ sudo mkdir / mnt / tempvol
Ubuntu @[ip]: ~ $ sudo mount -nouid / dev / xvdf1 / mnt / tempvol

mount: wrong type of fs, wrong option, bad superblock under / dev / xvdf1,
code page or program missing, or other error

In some cases, useful information can be found in syslog - try
dmesg | tail or if.

Typing "dmesg | tail" gives me:

[  626.631886]    EXT4-fs (xvdf1): Unrecognized "nouuid" mount option or missing value

I searched on Google but I found nothing useful. What am I doing wrong?

Thank you again for your help; pleased to provide any more relevant information.