The docstring for calib_psf_candidate reads:

            self.candidateKey = schema.addField(

                "calib_psf_candidate", type="Flag",

                doc=("Flag set if the source was a candidate for PSF determination, "

                     "as determined by the star selector.")

            )

However, if the reserve fraction is set to a non-zero value, an object that was selected as a PSF candidate by the star selector but then flagged as reserved will have the calib_psf_candidate flag set to False. This is inconsistent with the docstring (and erroneously implies the object was not deemed a suitable candidate). Please update the setting of the flag to reflect its docstring description.