update a xmltype column

I'm trying to execute this update

update devweb.forms set forms_data = updatexml('<?xml version="1.0" encoding="UTF-8" standalone="yes"?><ns16:local xmlns="http://www.dpssbenefits.lacounty.gov/xsd/forms/QR7_1_0.xsd" xmlns:ns2="http://www.dpssbenefits.lacounty.gov/xsd/Common_1_0.xsd" xmlns:ns3="http://www.dpssbenefits.lacounty.gov/xsd/DocumentManagement_1_0.xsd" xmlns:ns4="http://www.dpssbenefits.lacounty.gov/xsd/forms/Verifications_1_1.xsd" xmlns:ns5="http://www.dpssbenefits.lacounty.gov/xsd/forms/SAR73_1_0.xsd" xmlns:ns6="http://www.dpssbenefits.lacounty.gov/xsd/forms/SAR72_1_0.xsd" xmlns:ns7="http://www.dpssbenefits.lacounty.gov/xsd/forms/SAR7_1_0.xsd" xmlns:ns8="http://www.dpssbenefits.lacounty.gov/xsd/forms/QR7LA_1_0.xsd"