It was decided to perform a mass change through pdm_load to set the Expiration Date for knowledge documents. After a few weeks, it was noticed that knowledge documents are being retired earlier than the defined Expiration Date.
According to "History & Versions" tab:
Notice that the Expiration Date was changed from 2017-12-30 to 2017-07-10 and it was not performed by an end user.
Through pdm_load, the Expiration Date was set to the end of 2017, but somehow it was changed to months earlier and expired the knowledge document.