Why was this image rejected for an Intellectual Property violation?

[#1]

I'm new to stock photography, so this may be "user error," but I was confused with a rejection of one of my images (below) on the grounds of an Intellectual Property violation. There is no recognizable feature that I can imagine that warrants this specific type of rejection. Any ideas? Is the canoe the problem (there is no brand name visible that I can see)?

Thanks,

Jon

[#2 · Accepted solution]

Is there any writing on the paddles? It's too small in the version you uploaded to tell.

[#3]

Thanks Szalam. Not, there is not writing on the paddles, but your question prompted me to look at a higher resolution version and, although it's very dark, I can see writing (brand name) on the bow of the canoe, which I could not see in another version of this image. I suspect that is the reason why. I appreciate you taking the time to respond. -Jon