Getting a 409 error - How do I resolve this conflict? or What causes a 409 error and how can I fix it

Thanks for all the tips, guys! Tried the `ETag` thing and it *kinda* worked, but now I’m getting a different error. Ugh.

Anyone know why adding `If-Match` would cause a 412? Is that just the server being extra picky?

Also, shoutout to the Postman suggestion—totally saved me from losing my mind.