"We have one common trouble, one enemy. Therefore, internal contradictions should be resolved through open dialogue to achieve a single common goal — to defend our country. I am confident that Ukraine will be saved by strong military and institutions," Military Intelligence Chief Kyrylo Budanov said.
I’ve seen commenters saying it’s a response to Russian infiltration of the two organisations. This is obviously a move that will be endlessly propagandised by pro-Russian sources, so it’s going to be hard to tell facts from anti-Ukraine spin.