FR 6921 then FR 6523 at Barcelona
Dublin → Barcelona → Bratislava
Timetable, Barcelona time
21:40FR 6921 from Dublin at the gate
21:15FR 6523 to Bratislava leaves the gate
23 h 35 apart on the timetable, overnight
FR 6523 leaves 23 h 35 after FR 6921 arrives on the timetable: more than half a day, so not a connection we count.