  The earlier search at HERMES for narrow baryon states excited in quasi-real
photoproduction, decaying through the channel $pK_S^0\rightarrow p\pi^+\pi^-$,
has been extended with improved decay-particle reconstruction, more advanced
particle identification, and increased event samples. The structure observed
earlier at an invariant mass of 1528 MeV shifts to 1522 MeV and the statistical
significance drops to about 2$\sigma$ for data taken with a deuterium target.
The number of events above background is
$68_{-31}^{+98}\text{(stat)}\pm13\text{(sys)}$. No such structure is observed
in the hydrogen data set.
