Need help, missing layer
hi
i am working on a youtube video project and 
i don't know how but the whole V2 layer just somehow overwritten my V1 layer
see the photo i have v2 layer selected and what currently is v1 layer that was v2 layer that automatically just went down a layer and overwritten the bottom layer
i have lost 3 days of work here, i have checked all the autosaved projects but found nothing
i have faced this issue 3-4 times now
whichever layer is selected in the timeline goes down and overwrites the layer underneath it
is there any fix to this? so I can recover my work if not then any tips on how i prevent this from happening in future?
i have tried to do undo it - it didn't fix it
i have opened the earliest autosaved project it is also not there
Need urgent help so i can continue with the project

