Occasional attempts to download wrong p_astro file

According to flower (screenshot below), a task tried to download pycbc.p_astro.json from G800030 (a gstlal event), and gstlal.p_astro.json from G800132 (a pycbc event). Preliminary notices are still getting sent out, e.g. for S221208gc, so this can't be happening for every event.