In my artcile it shown this code for the extra filed weblink :

[{"name":"","value":"","target":"new"}]

I have three extra fields for weblink and if non of them is filled the filed still shown wit hthis strange code [{"name":"","value":"","target":"new"}]

What can i do to fox it

www.aefe-asie.net/site/v3/pedagogie-primaire-secondaire/espace-secondaire/mathematiques/item/177-nouvelles-modalit%C3%A9s-%C3%A0-l%C3%A9preuve-%C3%A9crite-de-math%C3%A9matiques-au-brevet-des-coll%C3%A8ges-2013

Problem solved when i reinstal K2