Must the Asr prayer be repeated after being combined with the Dhuhr prayer with the intention of travel, then the call to Asr prayer was heard while moving along the travel route?

The more precautious approach is to repeat the Asr prayer if a traveler combines Dhuhr and Asr before embarking on the journey, because many scholars prohibit this. However, if they do not repeat it, we hope there is no sin upon them.