SnapshotPlanMembers Error - Where to find information about the error types: "Index: X, Size: X"

Summary:

Running a Supply Plan unconstrained, suddenly started to erroring out and the log is really unclear. I cuoldn't extract nothing from the logs

Anybody knows how to map these "job got business error with message:  Index: N, Size: N" errors in SnapshotPlanMembers jobs?
Im trying to figure out the root cause of a "SnapshotPlanMembers job got business error with message:  Index: 3, Size: 3" error but nothing in SCP tables or manuals have rerefences to these errors. I don't want to raise an SR because I presume there migh be underlying tables that should keep this data.

Now the plan is running OK but I need to understand how to face it instead of raising an SR, the errors are very poor in information