Error:

Transaction aborted: Database operation "0or1row" failed (exception ERROR, "ERROR: null value in column "tree_sortkey" violates not-null constraint DETAIL: Failing row contains (106138, 31952, en:weblog, null, null, null, null, ::xowiki::Page, text, CR_FILES, null, null). CONTEXT: SQL statement "insert into cr_items ( item_id, name, content_type, parent_id, storage_type ) values ( v_item_id, new__name, new__content_type, v_parent_id, new__storage_type )" PL/pgSQL function content_item__new(character varying,integer,integer,character varying,timestamp with time zone,integer,integer,character varying,character varying,character varying,character varying,text,character varying,character varying,character varying,text,character varying,boolean,cr_item_storage_type_enum,integer,boolean) line 86 at SQL statement ") ERROR: null value in column "tree_sortkey" violates not-null constraint DETAIL: Failing row contains (106138, 31952, en:weblog, null, null, null, null, ::xowiki::Page, text, CR_FILES, null, null). CONTEXT: SQL statement "insert into cr_items ( item_id, name, content_type, parent_id, storage_type ) values ( v_item_id, new__name, new__content_type, v_parent_id, new__storage_type )" PL/pgSQL function content_item__new(character varying,integer,integer,character varying,timestamp with time zone,integer,integer,character varying,character varying,character varying,character varying,text,character varying,character varying,character varying,text,character varying,boolean,cr_item_storage_type_enum,integer,boolean) line 86 at SQL statement SQL: select content_item__new('en:weblog', '31952', null, null, 'now', '0', null, '127.0.0.1', 'content_item', '::xowiki::Page', null, NULL, 'text/html', 'en_US', null, null, null, 'f', 'text', '31911', 'f')