DL is currently selling a flight with only a 30 minutes connection at MSP. The example I found is SFO-MSP-RAP (actually I now have this itinerary as well after a previous SLC-RAP flight was cancelled).
From ExpertFlyer and confirmed by @DLAssist minimum connection time at MSP is 40 mins (for Domestic

omestic).
So what am I missing - I've been to MSP many times and sometimes sub-hour connections are tough if you come in on one side and leave on the other. Is this just another oops moment for DL IT? I've often had a schedule change to an illegal conx, but they've never actually been trying to sell that at the same time.
I imagine eventually I'll get a yellow "schedule change" banner on this itinerary at DL.com but to this point nothing yet - weird.