Null Error in Write to Data Store Entity

Hi, community,

We are trying to create a simple process to correct some data via process start form and write to data store entity.

In the writing activity, I received an error message as follows:

  Problem: An error occurred in executing an Activity Class.

  Details: org.hibernate.PropertyValueException: not-null property references a null or transient value: ESPCustomerDT1234.discountrate Data:~

Actually, I didn't set any value on discountrate.

However, I turned off null constraint of dicountrate.

My CDT is configured like this and my data store has verified succesfully.

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