Currently "cleanup_database.pl --old-issues" removes also checkouts that contain unpaid fines. This will remove the checkout information from the fine accountlines in /cgi-bin/koha/members/boraccount.pl?borrowernumber=XXXX page which are crucial to keep so that the library is able to tell the patron where did this fine came from and why it needs to be paid. At least there should be an parameter to cleanup_database.pl to prevent the deletion of such checkouts but maybe we should even do this the default behavior? Classifying this as a minor bug because it could be debatable whether or not this is feature or bug. Although, I cannot think why any library would want those checkouts with fines deleted.