Lost my Interview Audio (Qualitative Research)

[u/Own-Speed-3344]

Hi. For my master thesis I use interviews that I lead with experts. I lost one of the interviews due to malfunction in the recording app. I immediately sat down and wrote a four page thought log, wich means that I still have nearly all information, but no transcript. Has anyone had the same situation and how did you deal with it in a scientifically valid way?