Patching a File in the EPM Workspace Web Application
Oracle recommends keeping records on customizations so they can be re-implemented on officially patched files. Do not overwrite newly patched files with old customized files.
The patching and extract procedures described in the following topics apply only to customizations described in this guide. All customizations or manual modifications of the web applications or static files may need to be reapplied if you apply an official Oracle OPatch.