You can correct custom feature files from the Project Explorer.
Procedure
In the Project Explorer view, expand the
Deployment Artifacts folder in the SOA project
and double-click the component implementation custom feature.
The custom feature opens in a custom feature editor.
Click the
Plug-ins tab. If the Java component
implementation plug-in is listed more than once, delete the plug-in duplicates.
Ensure that the version of the plug-in contained in the custom feature exactly
matches the version of the plug-in it refers to.
Ensure the custom feature file does not appear in more than one
subfolder of the SOA project. Delete any duplicates so that each Java component
implementation plug-in is contained in only one custom feature in the
workspace.