You're currently out of support (as Kentico supports 3 versions back). With Kentico 12 coming out next month this might be a good moment to upgrade!
Apart from that, a quick check through the Hotfix files mentioned by Eric, it seems it's a change in the core Kentico DLL's which (unless you have the source code license) you can't update.
You could try contacting Kentico support (email@example.com) directly to see if you can work around it.
Another option is to create a custom tasks that will manually 'repair' integration tasks.