Problems using the API and "sort"

[h0rst]

Hi!

To be honest, i don't know very much about MongoDB or why this
problem suddenly occured. However, adding an index to the
parameters i want to use for sorting, fixes the problem:

> use genieacsnew
> switched to db genieacsnew
> db.devices.createIndex({_lastInform: 1})

I hope that this won't break anything. Until now, everything 
looks good. But i still have no clue what might have caused 
it.

Kind regards,
Sebastian