You are trying to store a Unicode codepoint \u201c
using an encoding ISO-8859-1 / Latin-1
that can't describe that codepoint. Either you might need to alter the database to use utf-8, and store the string data using an appropriate encoding, or you might want to sanitise your inputs prior to storing the content; i.e. using something like Sam Ruby's excellent i18n guide. That talks about the issues that windows-1252
can cause, and suggests how to process it, plus links to sample code!