subversion

noun
  1. 1

    The act of subverting or the condition of being subverted.

  2. 2

    A systematic attempt to overthrow a government by working from within; undermining.

noun
  1. 1

    A revision considered more similar to preceding subversions than a revision deemed a new "version" is to preceding versions.

Source: https://en.wiktionary.org/wiki/subversion