I'm getting this error with any GPX file I try to upload via Garmin Connect, can anyone help?
This file has already been uploaded.
If you are trying to re-import an activity to 'repair it' or return it to 'unedited' conditon... you need to delete the old activity off of your account. This weekend Garmin Connect was really messed up - I had to delete and re-import two of my activities (out of three). Both times I had to delete the activity twice - to make it really go away!
Otherwise you will can't import it....and add it again (so have two of the same activity loaded onto your acccount) [...without doing some creative writing in the .fit file].
I always import .fit files that have been copied from my watch to the computer... or I 'export original' from GC (giving a fit file also, iirc).
[...without doing some creative writing in the .fit file]