Hey everyone, I'm having some issues with JOSM. I have a lake in my country that has two small islands on it, but I'm trying to upload a new version of this area where I have done more work, including more detail on the shore and the islands, and I am receiving the error "coastline inside natural=water, 2 objects: Lake". I'm assuming this error is referring to the two islands in the lake, but I'm not sure what the problem is, given as far as I can tell they have the exact same tags as the previous versions of the islands. The entire object is a big multipolygon, labelled as "natural=water", with two inner polygons forming the islands. I can't really tell what the problem is.
What am I doing wrong? Should I just hit upload despite the error? I'd appreciate some advice.