can't get haddock patch

Ben What does this mean? (below) Does it mean you have not pushed something to the haddock repo> This happens when I'm on branch wip/T9858-typeable-ben2, in the main repo Simon git submodule update fatal: reference is not a tree: 289ef817aad02c341beb6d4c28ba0495872f5a0f Unable to checkout '289ef817aad02c341beb6d4c28ba0495872f5a0f' in submodule path 'utils/haddock' simonpj@cam-05-unx:~/code/HEAD-2$