Make sure that same ID hash don't occur

[sourabhtk37]

Even though while hashing this doesn't happen but since we are slicing the hash and there might be cases where this error might arise.

[sourabhtk37]

Put checks to make sure the db field is not overwritten

[sourabhtk37]

An improvement has already been made in the commit here. If you have further improvements, please share the details here.