Moving up production
China doesn't wait until the last minute to begin production of spacecraft so a report I watched claimed they have rocket close to ready for launch and others well along in production. It is an expensive fault as China plans many years in advance so there's a whole pipeline that must be sped up to get back inline with expectations.
I don't see it being a bad idea to have the next spacecraft ready to launch when there are manned missions being performed. At the end it means there will be a leftover, but that's just the cost of sending highly trained people out into the black. It's poor PR to lose people and often sets back manned programs for at least a couple of years with a massive price tag as well.