Thread:Project:Support desk/Database error when saving a page

I am currently running a private wiki (MediaWiki 1.23.0rc0, php 5.4.34 (cgi-fcgi), mysql 5.5.40-36.1-log, LUA 5.1.5). Problem I'm facing is the wiki shows a warning saying "Database error. A database query error has occurred. This may indicate a bug in the software." everytime I save a page. The lucky is the page is then saved. How I solve this error? Thank you.