The report, on the Eastern Approaches blog, states that
the pedestrian section of the border crossing (unique on this border) is
a recent addition. Even a basic reading of their own piece, which
refers to the happening “smuggling” staged by the excellent REP group of
artivists, would have shown that the pedestrian crossing has been open
for at least five years. While this may not be a significant amount of
time in the entire history of this historic (and historically shifting
and contested) border, it certainly is when considering current border
arrangements in the context of Poland’s membership of the EU and the
Schengen Area.

Read more here.