CubikStudio adds unwanted texture in the final atlas

[rigirerei]

I have a 4096x4096 texture but when I export the model as obj, CubikStudio creates a new 8192x8192 with an unwanted texture as you can see here: https://prnt.sc/10mcfi6
How can I export my model to use only the texture that I want? There aren't any other loaded textures in the Elements Material section: https://prnt.sc/10mchja

[rigirerei]

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