### Please describe the problem.
I normally use two clients with the assistant (lets call them A and B) and they are usually online at different times.
Sometimes, after deleting a file in A, I turn on the client in B and when rescanning, instead of deleting that same file from B, it adds it back to A.

I can always delete the file again, but it's a bit annoying. Anyway, it's a lot better than data loss ;)

Might be worthy to mention that the computer running client B is quite slow and has a slow HD. I have 4 git-annex repositories and when I turn on the computer the rescan can easily take up a couple of hours.


### What steps will reproduce the problem?
B -> is turned off

A -> delete file

B -> turn on and wait for rescan

B -> readds the file instead of deleting it


### What version of git-annex are you using? On what operating system?
6.20160923 (Debian Sid)

### Have you had any luck using git-annex before? (Sometimes we get tired of reading bug reports all day and a lil' positive end note does wonders)

I've been using git-annex for years with 4 different repositories, 3 of them pretty big (> 50 GB) and I'm really happy! :)