I have a large land cover layer, which is hard to work with as it slows down the system. I clipped it to one region, but I noticed a problem with one large polygon. In the original layer, this polygon has the attribute of Shrubland but after clipping when I click on the polygon using the Identify button, it gives 6 different attributes! If I click and select using highlight/Select button there are 6 different polygons selected. I have not had a similar problem before and am quite confused as to how this could have happened as it doesn't make sense. This issue has not happened with the smaller polygons.
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