uniad服务端回调，报错'encrypt_key' of undefined

uniad 激励视频播放完后回调云函数uniAdCallback，查看日志发现报错
[uniAdCallback/ac1cc3201726255247499114601/415ms/DEBUG] TypeError: Cannot read property 'encrypt_key' of undefined
at decryptData (/tmp/function/validator-weixin.js:170:65)
at processTicksAndRejections (internal/process/task_queues.js:97:5)
at validate (/tmp/function/validator-weixin.js:62:22)
at validate (/tmp/function/validator-weixin.js:206:18)
at exports.main (/tmp/function/__index.js:41:23)
at $e (/tmp/function/index.js:1:85141)
at Ve (/tmp/function/index.js:1:86228)
at runUserFunction (/code/index.js:93:265116)
at (/code/index.js:93:259283)
[uniAdCallback/ac1cc3201726255247499114601/415ms/DEBUG] total-time::191
请求响应状态: success

opendb-open-data表中，已经有encrypt_key，请问这个要怎么处理？