git add -N vs. git stash

Hello,

somehow git stash doesn't understand the index after git add -N:

	$ git version
	git version 2.36.1

	$ git init -q

	$ echo foo > foo

	$ git add foo

	$ git commit -a -m .
	[main (root-commit) 0e4b48cb4913] .
	 1 file changed, 1 insertion(+)
	 create mode 100644 foo

	$ echo bar > bar

	$ git add -N bar

	$ git stash push
	error: Entry 'bar' not uptodate. Cannot merge.
	Cannot save the current worktree state

I'd say that's not a feature, is it?

I would have expected the last command to just remove bar from the
index.

Best regards
Uwe