Closure code populates to 1 - Successful for CreateChangeRequest in 9.4

Hello Experts,

we are creating change request using webservice CreateChangeRequest on HPSM 9.4

In response of change requets we receive clouser code 1 by default when change got created.

How to set default value to null or empty.

We tried setting Allow NULL:Allow NULL:Allow null to true for cm3r and cm3t table using Tailoring => Tailoring Tools => Data Validation =>

in Field Name provide completion.code and set Allow null to true and Defaul to empty.

But it is not working HPSM9.4

Please help me to resolve this issue

Allow NULL: