Create Cost Accounting Distributions program rolling back with error

Summary:

Create Cost Accounting Distributions program rolling back with error as below without creating any distributions.
The process Cost Distribution failed because of an error. Contact your help desk.

Content (please ensure you mask any confidential information):

Here is the error with Cost distribution processor-

Process rolled back and aborted due to SQL Exception on CstDistProcessor3/insertCostDistLines: ORA-01400: cannot insert NULL into (???)

This is happening only for one cost organization. It was working fine until mid July. Suddenly started getting this error.

We have already validated the necessary configurations and everything looks good.

Please advise if any specific setup that needs to be checked and corrected.