Faulty tacho

Quick question as I’m on the job now. As agency but at a company got asked to take a unit to dealer because it has a tacho fault (screen is red and speedo keeps dropping to 0), ok no probs I say, so I take a print out of vehicle tacho (because it spits card out during a trip apparently), now the question.
Once it’s fixed do I manual entry from 07:00 start as other work till card in? Then carry on as normal? Or take print out of tacho head again then start card from then? I’m 90% sure the first question is yes but never experienced broken tacho before.

Manual entry from 07:00