What is that GUID on your new server, using Item Browser I suspect you will not get a name. What if you look on your old server? It is likely you will get a name/description of the GUID/item. The task is likely associated with or referencing this GUID, which does not exist in the new server. For example, the software resource does not exist, the command line has not been migrated, or SEPIC was used on the old server but has not been installed, etc.