In my opinion and from what I understand about property releases related to copyright, I believe the reason for rejection will be different from what I uploaded, which is a photo rejected for missing a generative AI flag, so my photo was suspected to be AI-generated. So I think it has nothing to do with the property release.

I’m uncertain if Adobe can accept this image. Here’s why:

1. The entire subject is a cutting mat with grid lines that are in public domain. 
2. Adobe Stock doesn’t accept public domain or copyright-free content.
3. Contributors must have copyright ownership to work they submit to Stock.

https://helpx.adobe.com/stock/contributor/get-started/manage-your-account/intellectual-property-violation.html

Good luck. Keep us posted on what happens.

That happens to me all the time because I mostly use AI, even though I have over 500,000 photos in my personal library. When I post a real photo taken with a camera, I start my description with "real image". That works every time. Just resubmitted with real image in front of the description. 

Hi ​@3N+Herdadi 

If this is a Photo as you said, you resubmit it. The system typically select the file media type. You need to make sure that the file/media type selected is Photos.

Best wishes
Jacquelin

Resubmit with a signed property release.

https://helpx.adobe.com/stock/contributor/content-policies-guidelines/model-property-releases/property-release-overview.html