DiaObject `g_psfFluxSigma` meaning

Hi, reposting this question from Lasair forum as recommended by Lasair dev.

Is the column g_psfFluxSigma in DiaObject the uncertainty on the latest g-band observation?

LSST Schema browser says: ‘Standard deviation of the distribution of g_psfFlux’

This is worded slightly ambiguously because it could either be the std of all g_psfFlux measurements or just the latest.
In the Lasair schema g_psfFlux, is just the latest g-band flux, so I’ve assumed FluxSigma is also the latest.

Thanks,
Chris