In order to curb script timeout errors some measure must be in place in SP2 to disable script on items that will likely time out. To fix this you can open them for edit and make the available numbers have less possibilities.
for example if the number range is 600000 to 720000 that is too much. This mistake should have been caught years ago but nobody noticed. A hundred numbers is more than enough for a trainz session so just reduce the numbers available.