Issue #2542748 by plach, effulgentsia, jhedstrom, Gábor Hojtsy, alexpott,...

Issue #2542748 by plach, effulgentsia, jhedstrom, Gábor Hojtsy, alexpott, mpdonadio, catch, dawehner: Automatic entity updates can fail when there is existing content, leaving the site's schema in an unpredictable state