In June 2370, the Sovereign was launched however, initial testing of the Sovereign's new additions to its defensive and offensive systems proved disappointing. Design flaws in the regenerative shields led to phase synchronization instabilities in the graviton polarity generators powering the upgraded shields. The enhanced deflector system, which was upgraded with a new gravimetric distortion package, required extensive amounts of power that caused a drain on other essential systems. It was deemed too inefficient by Starfleet standards and the Sovereign was sent back to the Mars shipyards for storage and design reference. Many of these problems would be fixed by 2372 however. (TNG video game: Bridge Commander; SCE - What's Past eBook: The Future Begins)