How unique are the Entry ID field

Hi there,

I want to create a fully automated workflow using Devolutions RDM using the PowerShell module. This workflow will use the entry ID as input. This same workflow will be also implemented within the same data source but on a different vault.
My question is, is the Entry ID field unique on the data source level or on the vault level?
I know, the field is 16 bytes long field and getting the same two IDs is very unlikely, but I want to make sure to eliminate this risk completely by understanding the uniqueness of the Entry ID within a data source.

Thanks!