Fields coded as “K” or “K*” in the PIMS Manual Volume 1. These fields, once uploaded, cannot be overwritten. In this situation if uploaded data with a key field needs to be corrected, the entire record first must be deleted by the Pennsylvania Department of Education (PDE) staff and then the corrected record must be uploaded. A field or a group of fields coded as “K” or “K*” which together form a unique identifier for a record.