getPstnCalls tabular response contains a Call ID that is not unique

Phil Smith 36 Reputation points
2022-04-11T10:29:30.457+00:00

ID is short for Identifier. An Identifier, by definition, must be unique. Microsoft’s online documentation contradicts itself. In the header info below it states:
Each row maps to one call. One column is the CallID. It states it is not guaranteed to be unique.
This suggests each row does not represent a call but part of a call.
Which is it?

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Microsoft Graph
A Microsoft programmability model that exposes REST APIs and client libraries to access data on Microsoft 365 services.
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