Hey Rajesh,
With the low amount of information given here, I can't really say what could be causing this. Do you think you could share the text of the error?
The
Cloud Status Dashboard is showing no issue, and I can't find any mention of any issue internally. In the absence of these and the absence of other users reporting the same, I'd say this is likely to be an issue with the entities themselves, since as you say the code hasn't changed. But this could also be a transient and rare issue affecting just your app for a given time-frame - we can't know any of this without more details.
Cheers,
Nick
Cloud Platform Community Support