Checked the issue raised by Ms. Rae, the reference no. from the G/L entries appeared to exist. Validate if the ref. no. exists from the previous batch, they claimed that it's not been used yet. Escalate the issue to Jupiter for further checking. They found that the ref. no. is already used in other transaction but from the year 2008 and payroll team is not aware of that. The ref. no. can't be duplicated, I extracted all the numbers used for the payroll team's reference. This has been resolved.