I want atctive my item ,say
A similar item has been activated before. (0, 1349290, 1349291)

Do not worry about it. It says that because you allready have a Right Thigh texture activated and you cant upload 2 of the same sized body textures.

If you want to change the image just go to your activated and change it from there.

Or you can just deactivate the activated one, and activate the deactivated one. Works either way.

Maybe you could use a more specific thread title. Also, if you are activating an item that effects a bodypart that another one is, deactivate both, and activate the one you want.