[Koha] fixing marc and marcxml

Hi, I had some malfunction (probably incorrect configuration of one framework) in my Koha. One of the results was that items.marc and items.marcxml were build without the 952 fields. Koha still work (circulation, etc.), but it is impossible to edit items. So I need to fix the marcxml and marc fields in the items table. Do someone have a script to fix this? Thank you Verónica Lencinas Yahoo! Cocina Encontra las mejores recetas con Yahoo! Cocina. http://ar.mujer.yahoo.com/cocina/