Input contract violation in After Effects

When switching back and forth between Cinema4d and After Effects (I know, there's Cineware, but that is not yet suitable for power users), making the mistake to re-render (and overwrite) a clip that was already imported in AE will result in a loop of error messages which can only be escaped from by force quitting After Effects.

Wouldn't it be possible to let After Effect just replace the file by a proxy? Or give the user the option to either forget the clip or replace it? A bit more empathy with the user is required.