Script Editor Feature Request: downgrade 'Class already exists' to a warning

[Tajfun403]

Is your feature request related to a problem? Please describe.
Currently, if a class already exists in one of the startup files and its copy is being viewed in a different package file, an error "Class already exists" is being thrown, preventing edits:

This situation can often exist naturally when working on merge mods - the class itself is being worked on in a separate package file, and then merged into SFXGame via a merge mod. Currently, in order to make edits to the source .pcc file, SFXGame needs to be restored to vanilla each time, which prolongs the edit pipeline.

Describe the solution you'd like
If it's not a technical limitation, it would be beneficial if this error could be downgraded to a warning instead.

Describe alternatives you've considered
Currently the only solution to this problem is to restore SFXGame (or other startup file) to vanilla before opening the source package, which prolongs the edit pipeline and needs to be repeated each time an edit is required.