title: Duplicate versions of nbextensions - how to know which one to delete
body: <p>I want to install nbextensions for my juypter notebooks.  Having followed the instructions from <a href="https://jupyter-contrib-nbextensions.readthedocs.io/en/latest/install.html" rel="nofollow noreferrer">here</a>, I can see the nbextensions dashboard.</p>
  <p>However when I go to enable this I get the following error:<br />
  &quot;This nbextension's require url (splitcell/splitcell) is referenced by two different yaml files on the server. This probably means that there are two installations of the same nbextension in different directories on the server. If they are different, only one will be loaded by the notebook, and this may prevent configuration from working correctly. Check the jupyter notebook server log for the paths of the relevant yaml files.&quot;</p>
  <p>I find that I indeed have multiple entries....</p>
  <p><a href="https://i.stack.imgur.com/trj9g.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/trj9g.png" alt="enter image description here" /></a></p>
  <p><a href="https://github.com/Jupyter-contrib/jupyter_nbextensions_configurator/issues/25" rel="nofollow noreferrer">This link</a> suggests to delete one (though there are actually 3)... what I don't know is which...  I don't want to delete something that then breaks my jupyter instances completely.</p>
  <p>I have the feeling that I am not using the instance under anaconda.  What do I damage if I delete this?</p>
  <p>Appreciate any insights, and let me know if you need more information,<br />
  J</p>