Why tf is there a state border here? Neither Ukraine nor Russia claim their borders there. Crimea is internationally recognised territory of Ukraine and was illegally occupied after a fake referendum. Later, this farce was repeated in Kherson, Zaporizhia, Donetsk and Luhansk. So, to be consequent, there should also be a border marking these new Russian claims OR, and this is the solution I personally prefer, this border should be removed according to international law.