update Prev/Next Topic link on user_guide/database/index.html
diff --git a/user_guide/database/index.html b/user_guide/database/index.html
index 594de80..1f0a1da 100644
--- a/user_guide/database/index.html
+++ b/user_guide/database/index.html
@@ -86,7 +86,7 @@
<div id="footer">
<p>
-Previous Topic: <a href="../libraries/config.html">Config Class</a>
+Previous Topic: <a href="../libraries/caching.html">Caching Class</a>
·
<a href="#top">Top of Page</a> ·
<a href="../index.html">User Guide Home</a> ·