How to change Gold to non-Gold

As the publisher (poster) of any item - it is your prerogative to assigning Gold or non-Gold. You should be able to edit the original post and change its status. (But this may have been changed relatively recently and thus limiting a threshold of likes before someone can edit their own posts).

If unable to edit your own post - your reporting is appropriate to ask a Mod to change it. I'll assume the Mod wasn't fully aware that you are the one who initially posted it.

It's always a judgement call to made an item Gold [some degree of exclusivity at the cost of fewer likes] or non-Gold [probably gather greater likes but at the potentially higher risk of someone leaking to another site] - - - but it's your call.

 

I now see this was tweaked:
https://p-v.club/threads/editing-your-own-posts-or-threads.35845/

You should re-ask a Mod to edit your post again and emphasize that you're the OP author wishing to change to non-Gold.

 

You should see more about whether there are not many people who are interested in the content you share, or it is too old.