Generalised Kauffman conjecture on slice derivatives

Let $K$ be a knot, and let a slice derivative mean a derivative of $K$ that is slice in the relevant category. Generalised Kauffman conjecture. If $K$ is a topologically (respectively, smoothly) slice knot, then there exists a topologically (respectively, smoothly) slice derivative of $K$. This asks whether the converse to the fact that a knot with a slice derivative is slice also holds. The smooth version would follow from the slice-ribbon conjecture, and the conjecture remains open.