TypeError: Cannot set property 'last_reply' of null

[fengmk2]

/home/www/git/cnode/node_modules/mongoose/lib/utils.js:413
        throw err;
              ^
TypeError: Cannot set property 'last_reply' of null
    at Promise.<anonymous> (/home/www/git/cnode/proxy/topic.js:178:22)
    at Promise.<anonymous> (/home/www/git/cnode/node_modules/mongoose/lib/promise.js:120:8)
    at Promise.EventEmitter.emit (events.js:95:17)
    at Promise.emit (/home/www/git/cnode/node_modules/mongoose/lib/promise.js:59:38)
    at Promise.complete (/home/www/git/cnode/node_modules/mongoose/lib/promise.js:70:20)
    at /home/www/git/cnode/node_modules/mongoose/lib/query.js:875:30
    at /home/www/git/cnode/node_modules/mongoose/lib/utils.js:408:16
    at /home/www/git/cnode/node_modules/mongoose/node_modules/mongodb/lib/mongodb/collection.js:935:5
    at /home/www/git/cnode/node_modules/mongoose/node_modules/mongodb/lib/mongodb/cursor.js:148:9
    at /home/www/git/cnode/node_modules/mongoose/node_modules/mongodb/lib/mongodb/cursor.js:188:11

[youyudehexie]

修复失效。