Integrity constraint violation on langcode collumn

When I try to open "My Workbench" or any of the 3 views that came with the module, I get this error :

[Wed Jun 15 17:49:03 2016] [error] [client XXX.XXX.XXX.XXX] Uncaught PHP Exception Drupal\\Core\\Database\\IntegrityConstraintViolationException: "SQLSTATE[23000]: Integrity constraint violation: 1052 Column 'langcode' in field list is ambiguous: SELECT node_field_data_node_field_revision.langcode AS node_field_data_node_field_revision_langcode, node_field_revision.vid AS vid, users_field_data_node_field_revision.uid AS users_field_data_node_field_revision_uid, node_field_data_node_field_revision.nid AS node_field_data_node_field_revision_nid, langcode AS langcode\nFROM \n{node_field_revision} node_field_revision\nLEFT JOIN {users_field_data} users_field_data_node_field_revision ON node_field_revision.uid = users_field_data_node_field_revision.uid\nLEFT JOIN {node_field_data} node_field_data_node_field_revision ON node_field_revision.vid = node_field_data_node_field_revision.vid\nINNER JOIN {users} users_field_data_node_field_revision__users ON users_field_data_node_field_revision.uid = users_field_data_node_field_revision__users.uid\nWHERE ((( (users_field_data_node_field_revision__users.uid = :db_condition_placeholder_0) )AND (node_field_data_node_field_revision.type IS NOT NULL ) ))\nORDER BY node_field_revision.changed DESC\nLIMIT 5 OFFSET 0; Array\n(\n [:db_condition_placeholder_0] => 1\n)\n" at /var/www/html/d8_sandbox/core/lib/Drupal/Core/Database/Connection.php line 668, referer: http://server:8004/fr/admin/structure

Use a Drupal 8.1.2 with Workbench, Workbench Moderation and Group modules.