"rejection for intellectual property reasons" was the rejection reason for an astrofotography image of IC5070 I took several weeks ago. Who would be declared as owner of this property?

This is the picture. It’s a RGBSHO Image taken with a QHY268m and processed in Pixinsight and Photoshop. No genAi used - just denoise and deconvolution.
Can someone help me understand why such a picture is rejected with the reason “intellectual property”?
Thx SK
PS: the uploaded Version to Adobe Stock is w/o the watersign (bottom left)
