Potential source of photography plagiarism
The image you posted is the primary source of value for your post or you have posted an image in one of the photography/art curated tags without attribution or source. By doing so you are claiming to be the sole content creator and that the image is original to yourself.
Plagiarism is the copying & pasting of others' work without giving credit to the original author or artist. This includes manually reproducing the work of others.
Guide: Why and How People Abuse and Plagiarise Repeated plagiarism is considered fraud.
Fraud is discouraged by the community and may result in the account being Blacklisted.
If you believe this comment is in error, please contact us in #appeals in Discord.
The rules of that challenge clearly state that only your own photos are allowed to be submitted, so even if you provided the source, the submission would be invalid.
It appears that you attempted to submit someone else's photo pretending to be the author.
As we have found out that you have a perpetual history of plagiarism fraud or copypasta in the posts, it was like an attempt to defraud in this case too.