Galaxy S6 Edge: une erreur s'est produite lors de la mise à jour...

Hello,

I recently acquired a Galaxy S6 Edge, and like with my previous phones, I wanted to root it. That's where the problem arises. I skimmed through a few topics and performed this manipulation: using ODIN and the download mode of the phone (power + vol.down + home), the issue is that instead of inserting a new ROM using the AP button in ODIN, I inserted a boot.img file... At the time, I didn't think too much about it; it seemed to be the right thing to do. So, the phone rebooted fine, but of course, it was not rooted at all. I then tried to reboot, and that's when disaster struck: it started to loop the reboot, eventually ending up with this message: "An error has occurred while updating the device software. Use the emergency recovery function in the Smart Switch PC software."
The phone now only turns on in download mode and only if it is connected to my PC. I downloaded Kies3 and Smart Switch, but my S6 Edge is no longer recognized by the PC, nor by Kies or Smart Switch; however, it is recognized by ODIN.
Thank you in advance for your responses.