IRRd 4.0.4 was released on July 15th, 2019, and contains
one change relating to the behaviour of changed:
attributes in RPSL objects.
In earlier versions of IRRd, format of the changed
attribute was entirely free. In IRRd 4.0.4, the format
is expected to be <email> [YYYYMMDD] with an optional
comment, as allowed with other RPSL attributes. The date
is optional. Regardless of the date, if any, set in the
attribute, it will be overwritten by today’s date[1],
unless the override password was used. Pre-existing
changed attributes are not affected.
[1] #242