Each row is stored in the following format, and the latest version is always written in the first row.
[version]\t[newly added models which is separated by commas]\t"[update messages]"
e.g. The contents of current_version are as follows:
3 hyaudio_1,hyaudio_2 "add hyaudio_1 and hyaudio_2 model"
// others
That means the latest model version is 3, the newly added models is hyaudio_1 and hyaudio_2,
and the updata message is add hyaudio_1 and hyaudio_2 model