Ghost Image in Illutrator when exporting selection

I need help with AI:

I created an image some time ago, and since then, whenever I create a new AI article and try to export a selection along with the new image, the old image appears behind it. I've tried everything to find out where this darn image is hiding (yes, because it only shows up when AI generates the new article, whether in pdf or svg... I haven't tried generating others like png or jpeg, but I believe the same problem would occur).

The solutions I found were:

1. Save the article for screens as pdf or svg;

2. Edit the pdf file in Acrobat.

This doesn't seem very smart to me. I would like to know how to get rid of this 'ghost'.

PS: I'm attaching the image of a PDF article that I generated, with the 'ghost' behind it...

{Renamed by MOD}