I cannot switch branch.

gnanasoundarraj.d

I cannot switch branch. I cannot discard the file. URL:  https://gnanasoundarraj.d@git.dhcpaas.com/incarnus/incarnus.git 

Error : 

git
-c diff.mnemonicprefix=false -c core.quotepath=false --no-optional-locks checkout --
public/bower_components/tinymce/plugins/toc/plugin.min.js
error: unable to create file public/bower_components/tinymce/plugins/toc/plugin.min.js: File exists
Completed with errors, see above.