title: delete whole couchbase lite db issue
body: <p>I wanna delete my entire <code>Couchbase lite DB</code>, but for some reasons some records won't be deleted, I tried the following code:</p>
  <pre><code>try{ db.delete()} catch{...}
  </code></pre>
  <p>but it won't work,
  it seems like <code>SQLite</code> got some problems with old indexes,
  with something like:</p>
  <blockquote>
  <p>revisionId has already existed...</p>
  </blockquote>
  <p>any help would be appreciated.</p>