Can the ZWARN be explained a bit more?

Hello! I’m trying to find object samples for a project and have some in my catalog that have a ZWARN value. In my cross match list the ZWARN value is either 0 or 4 but in the legacy sky viewer it is something like ‘ZWARN = 0x4’ etc…

I can see from other posts it means that the redshift is not a confident value but I want to know more about what the value actually means and what it means for potential samples.

Thank you to anyone who can help!

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You can find the file at:
ZWARN int64 See the desitarget data model; set to -1 (added to facilitate running randoms through the DESI fiberassign code)

Taken from Legacy Survey Files | Legacy Survey

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