code: public void repairCategories(CmsDbContext dbc, CmsUUID projectId, CmsResource resource) throws CmsException {
  
          CmsObject cms = OpenCms.initCmsObject(new CmsObject(getSecurityManager(), dbc.getRequestContext()));
          cms.getRequestContext().setSiteRoot("");
          cms.getRequestContext().setCurrentProject(readProject(dbc, projectId));
          CmsCategoryService.getInstance().repairRelations(cms, resource);
      }
docs: Repairs broken categories.<p>
  
  @param dbc the database context
  @param projectId the project id
  @param resource the resource to repair the categories for
  
  @throws CmsException if something goes wrong