OSIS-4527 fixed case child_branch and child_leaf is null into records from database
OSIS-4527 fixed case child_branch and child_leaf is null into records from database

uclouvain/OSIS-Louvain,uclouvain/osis,uclouvain/osis,uclouvain/osis,uclouvain/OSIS-Louvain,uclouvain/OSIS-Louvain,uclouvain/osis