ZBrushCentral

Old sketchbook topic locked first post

Hi i have a sketchbook going and did a big update yesterday Polydrawer`s Sketchbook

i noticed it shows the first posts image as a preview instead of any of the new ones and also i can`t update anything in the topics first post including the title or thumbnail.

is there a way to unlock the editing on it so i can update the thumbnail whenever i post? thank you