How to clear a model from textures

Good afternoon, tell me how to clear textures that are not displayed in Substain Painter? I made a UV scan and exported the model from Blender without textures, but for some reason a texture appeared when importing. You can't delete it, if you duplicate the same model in Blender, then the textures are loaded into Substaince again, and it's not clear where these textures come from. I deleted all the created materials in Substance, but the texture still shows up. What could be the problem?