POs went to Saved status

Hi SAP Experts,

We are using SAP 7 and we experienced an issue wherein the PO Should be auto approved but it is getting to Saved status. The issue was sovled after a restart of SRM but we need the root cause to prevent it from happening again.

The issue is intermittent and we noticed that the GUIDs of all 300 affected POs end in 08778646A.

Can you please advise if you are aware how the GUIDs are formulated? This could lead us to the root cause.

Regards,

Romeo