Why is there a discrepancy between the number of participants in category 190 and data-field 20263?

During the upload process for the V20 data release, a batch of data was inadvertently omitted. As a result, approximately 3,900 T1 surface model files, along with additional structural segmentations, are currently missing from data-field 20263.

These missing fields do not present any QC concerns, and all corresponding IDP values remain valid and suitable for use. However, the missing FreeSurfer bulk files will not be available until our next scheduled data release.

We apologise for any confusion this may cause and appreciate your understanding. We are sharing this update to ensure transparency and to keep all researchers informed.