Cannot update paths and switch to branch 'snapshot_mixuse' at the same time.

 dmj-parent git:(master) git checkout -b snapshot_mixuse --track origin/snapshot_mixuse
fatal: Cannot update paths and switch to branch ‘snapshot_mixuse‘ at the same time.
Did you intend to checkout ‘origin/snapshot_mixuse‘ which can not be resolved as commit?
?  dmj-parent git:(master) git remote show origin
* remote origin
  Fetch URL: git@git.superboss.cc:dmj/jxc.git
  Push  URL: git@git.superboss.cc:dmj/jxc.git
  HEAD branch: master
  Remote branches:
    master          tracked
    snapshot        tracked
    snapshot-item   tracked
    snapshot_mixuse new (next fetch will store in remotes/origin)
    snapshot_wlb    tracked
  Local branches configured for ‘git pull‘:
    master        merges with remote master
    snapshot      merges with remote snapshot
    snapshot-item merges with remote snapshot-item
  Local refs configured for ‘git push‘:
    master        pushes to master        (local out of date)
    snapshot      pushes to snapshot      (local out of date)
    snapshot-item pushes to snapshot-item (up to date)
?  dmj-parent git:(master) 

?  dmj-parent git:(master) git remote update
Fetching origin
remote: Counting objects: 28, done.
remote: Compressing objects: 100% (22/22), done.
remote: Total 28 (delta 14), reused 0 (delta 0)
Unpacking objects: 100% (28/28), done.
From git.superboss.cc:dmj/jxc
 * [new branch]      snapshot_mixuse -> origin/snapshot_mixuse
   275fed2..b289f38  snapshot_wlb -> origin/snapshot_wlb
?  dmj-parent git:(master) git fetch
?  dmj-parent git:(master) git checkout -b snapshot_mixuse origin/snapshot_mixuse
Branch snapshot_mixuse set up to track remote branch snapshot_mixuse from origin.
Switched to a new branch ‘snapshot_mixuse‘