It appears you changed the permissions of, or installed your own
/usr/bin/ssh:
unable to make backup link of './usr/bin/ssh' before installing new
version: Operation not permitted
I don't know precisely what you might have changed. Please try forcibly
removing and then reinstalling the openssh-client package.
** Changed in: openssh (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/2111355
Title:
package openssh-client 1:8.9p1-3ubuntu0.11 [modified: usr/bin/ssh]
failed to install/upgrade: unable to make backup link of
'./usr/bin/ssh' before installing new version: Operation not permitted
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