Adobe Creative Cloud (CC) 2014 was released in June 2014 and can be seen as a major version, similar to Creative Suite CS5 or CS6. Compared to previous versions of InDesign, it includes many differences such as a new file format and changes to the internal libraries.
Smart Styles for Adobe CC 2014
InDesign CC 2014 and InCopy CC 2014 require a dedicated version of Smart Styles, named Smart Styles for Adobe CC 2014.
Previous versions of Smart Styles such as Smart Styles for CC are not compatible with Adobe CC 2014.