Help to fix corrupted FIT-file please... Santa help me :-)

What was the distance and time supposed to be? This is fixed, but might be missing some data - 2020-12-03-08-12-12-fixed.zip

Distance should be 45,05 km and time 9:23:20....

Thanks you are amazing I will try to insert it....

OK I have inserted it it shows only 0,55 km :-) 
Well.... I there must be missing some data.... I don't know if there is anything to do?

What happened during the hike? Battery died? Forerunner crashed? Buttons got pressed while in your backpack? Ran out of space? It's suggested to regularly clean out the \GARMIN\ACTIVITY folder on the device using these directions: Removing Recorded Activities to Free Up Space on a Garmin Fitness Device

After realising it was only the first 500 meters I remember that the watch started. The GPS had shown "green" but when we walked the milage stayed at 0. So i stopped, saved the first and turned watch off and on again. Got a new signal and started a new session of walking. Seemed to work perfectly. 
If will not have been "running out of space" since my walk the next day and two days after have been OK. However I will remember to empty it.
Now I will check to see if there should somehow be two files from that day. The 45,05 km shows up in the watch, when I scroll through the different days, so I assume that it must be there somehow..