Hi, I'd like to know if it's normal that Garmin's prediction for my 5k time has changed by 8 seconds (21:09 to 21:01). I ran my first parkrun today in 19:29 (Garmin recorded 4.96km and didn't initially set a record). I manually added a training session, setting the distance as 5km and the time as 19:29. After this change, I have new records on my profile, but my predicted 5k time is 21:01. Is this normal? Maybe Garmin is taking into account all my training, not just the first race, and there's nothing I can do about it?
1st photo - recorded parkrun
2nd photo - my predictions (after I manally added 5k race with 19:29 time)
3rd photo - my records updated but predictions don't.