What does PO is Vacant in Case History mean?

My mother has filed two cases on our father about a year back, one by Police under 494 and 498(a) for bigamy and other under DVC filed by the lawyer we hired. nnFor both the cases we see the updates in eCourts app for multiple dates recently in case history as as "PO Is on Vacant. Case is Posted To {DD.MM.YYYY}" or "PO Is Vacant. Case Is Posted to {DD.MM.YYYY}". {DD.MM.YYYY} is some date. nnWe weren't notified either by Police or by our Lawyer to attend the court for the above dates where we see this updates in case history. My question is: What does PO is Vacant mean? nnI know PO means Presiding Officer (the Judge) but to me it doesn't specifically mean that PO is on some kind of leave when it says PO is "Vacant". Does it mean that PO is not present due to some reason? Or does it mean that we've wasted PO time by not attending and so he was "Vacant"? I didn't find any answer for this "PO is Vacant" thing in Google search.