train 2d n_splits and n_samples

[maggie-may-22]

When I try to run my first training, i get a ValueError saying n_splits=5 cannot be greater than the number of samples n_samples=1.

This is what I put in, and I have 2 datasets in my imagesTr and labelsTr folders at the moment.
nnUNetv2_train 765 2d 0 --npz

How can I fix this? Do I need more datasets? I was hoping to test if it worked before added my other data as plan_and_preprocess already takes 50 minutes to run on my computer with just these two datasets.

This is the output I get with preprocessing (i have two datasets: SHOULDER_001 and SHOULDER_002 in my raw data folder)

This is the error i get when running training

This is where the training log stops