after upgrading to RT 4.4.1 I’m facing the following issue:
When updating a Ticket in a certain queue (before submitting, opening
the update page is sufficient), RT logs the following warning message:
 [Thu Oct 27 12:11:24 2016] [warning]: Couldn’t load object RT::Transaction #0 (/opt/rt4/sbin/…/lib/RT/Interface/Web.pm:3107)
Using the source code, I was able to track this issue down to be related
to a Custom Field that is set up as follows:
Name: IP Address
Type: Enter one IP address
Applies to: Ticket Transactions
Entry Hint: Enter one IP Address
the other fields are empty.
If I disable this custom field for the queue it is enabled for, the
warning message disappears.
Does anybody have an idea what could be going on here?