I am updating an old Robohelp Classic document to RH2020 however I am having issues with my Index. Some of the formatting was changed when converting over (it appears due to using colons in the original Keywords) and during my attempts to edit the Keywords in question the Keyword reverts to their original state. I then tried deleting the old Keywords and upon deleting them they instantly reappear in my Index. I am able to add new Keywords and Topics but appear unable to edit or delete old ones. Could my Index keywords be locked in some way? Or is this a bug?