I saw a note 2116768 that said that ARCHIVE_ADMIN_CHECK_FILE got replaced by ARCHIVE_ADMIN_GET_FILE_INFO
The docu for this doesn't say anything about FILENAME, and a test in SE37 returns
content repository and document ID which are used to find the file in the archive system.
STORED_IN_CONTENT_REPOSITORY
STORED_AS_DOCUMENT_ID
I would suggest to open a ticket at SAP if you can't locate a change in your system except in the SAP programs.
At least I can confirm that all my stored archives do not have an entry in field FILENAME of table ADMI_FILES