> Candidly, the Roboflow team does not know.
It seems like, unless you can say with certainty that you have a legitimate claim to use an existing name, the right and safe thing to do would be to not use it. Just name your project something else. You lose the brand recognition of the existing name, but on the other hand you avoid the risk of your project getting dragged like this.
When in doubt, save yourself a headache and just use a different name.