If the library component is already being used then I would suggest that your best option is to copy and rename the component you wish to use, you should then be able to edit the attribute properties to your companies standards.
When you try to delete the codes, system gives you a list of components where code has been consumed. You need to edit these components, and use a code of your company standard and then later on delete the starter data codes.
If the code has been consumed directly in the VeSys Wiring Design, then you have to use "Find and Replace" functionality to replace the codes with your sandard codes.
Note : Codes usage within components library can also be find out in component maintainance dialog. Enter Code name > Press Search button.