When creating a LRS data model in the Roads and Highways extention, the Lrs_Edit_Log table is a minimum schema object of the Roads and Highways LRS Data Model. The Lrs_Edit_Log table has field "UserName", type "String" with field length 272.
The idea is to change the string length to 255. Why? Just because 255 is the shapefile/dbase limitation I suppose. If anybody has a name longer than 255 characters first I apologize, second, you should use a shorter user name when editing roads and highways database. It will also help with field validation based on a 255 length text field as a validation rule.