e2fsck but says mounted and cannot

[Jerry Geis <jerry.geis@xxxxxxxxx>]

I have a system that needs to run e2fsck (C7). I boot into rescue mode,
skip to shell (option 3).
enter they PW and I type:

e2fsck -y /dev/sda1
and it says is mounted. This is "/"

What do I do so I can run e2fsck ?

Thanks,

Jerry
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