Why License Usage has empty fields?

Getting Data In

Hi guys.
I was asking why my reports, using license_usage.log from LicenseMaster, for "LicenseUsage" sometimes do not log the "h" or "s" field (alias from host or from source).
Doing so, i can have a full report for Indexers or Sourcetypes usage, but not for Host or Sources.

INFO LicenseUsage - type=Usage s="" st="MY_ST" h="" o="" idx="MY_IDX" i="xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" pool="auto_generated_pool_enterprise" b=51331 poolsz=214748364800

May it be the origin forwarder version? I have forwarders from 6.x.x to 8.x.x version running.

Any clue? Thanks.

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