/srv/webcrm/crm/node_modules/redis/index.js:602
                throw err;
                      ^
TypeError: Cannot call method 'toString' of undefined
    at /srv/webcrm/crm/libs/Model.js:545:45
    at model.beforeSetSphinx (/srv/webcrm/crm/libs/Model.js:520:12)
    at model.setSphinx (/srv/webcrm/crm/libs/Model.js:527:10)
    at /srv/webcrm/crm/libs/Model.js:109:26
    at model.afterSet (/srv/webcrm/crm/libs/Model.js:76:5)
    at /srv/webcrm/crm/libs/Model.js:108:22
    at try_callback (/srv/webcrm/crm/node_modules/redis/index.js:592:9)
    at RedisClient.return_reply (/srv/webcrm/crm/node_modules/redis/index.js:685:13)
    at HiredisReplyParser.<anonymous> (/srv/webcrm/crm/node_modules/redis/index.js:321:14)
    at HiredisReplyParser.emit (events.js:95:17)