SChema change with an additional copyField

[Andrea Gazzarini]

Hi, after indexing a lot of data I found that in my schema is missing 
the copyfield declaration for my "spell" field..:(
The question is : do I have to reindex all the documents?
I'm asking that because the new field is just a copy of an existing one 
and so I was wondering if SOLR is able to understand that and create (at 
startup) that field copyning copying the other...

Regards,
Andrea