RDF export error: capgrids ValueError

[jessesnyder]

Exception thrown while running weekly RDF export:

2022-03-24 12:57:53 ERROR pleiades.rdf Exception caught computing grid extent for <Location at /plone/places/414508/batlas-locati
on>
Traceback (most recent call last):
  File "/srv/python27-apps/pleiades4/src/pleiades.rdf/pleiades/rdf/common.py", line 588, in place
    bounds = capgrids.box(mapnum, grid)
  File "/srv/python27-apps/pleiades4/src/pleiades.capgrids/pleiades/capgrids/__init__.py", line 48, in box
    row = int(gs[1:])
ValueError: invalid literal for int() with base 10: '1-C4'