[TYPO3-Solr] can't avoid page title indexing

[COZANET Mathieu]

Hello,

Il would like to index only a part of typo3 tree, so I added 

config.index_enable = 0 

in TypoScript Configuration of root pages of branches I do not want to index

but the indexer still store in solr core titles of these pages (and other datas, such as url)

does anyone knows how to totaly stop indexing of specific branches ?

Thanks,

Mathieu