Hi there!
I would like to remove the water mark on clothes given by CC. There is no trial mark on each cloth but I applied it to a character, the cc water mark appeared. 
How to remove it? 
I attached a picture captured from my screen.
Please advice... 

You have to change the character or clothing that causes this, or buy items from the market that you do not have.
You can see the products that cause this from the "View unpurchased Items" option in the Help menu.

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