Invalid Activity File fenix 5S

Hi!

Yesterday I was doing a swimming Threshold test and I pressed the Lap button to rest 2 minutes while resting my Garmin freeze and the blue triangle appeared, then I came back, but the activity disappeared, I started a new activity and happened again, but this activity was saved, now I see both activities but the first one shows as INVALID, Is there a way to recover that activity?

Thanks

Nathy