In going from workbench moderation 1.3 to 3.0 there are several problems that need patching. It's a bit confusing which and what patches are needed. See https://www.drupal.org/project/workbench_moderation/issues/2428371#comme...
In my installation the upgrade_from_1x3_to_1x4_fails-2428371-45.patch didn't match up with the lines in the file workbench_moderation.module So I manually edit the file. I did do core update D7-2615496-68.patch from https://www.drupal.org/node/2615496 fo "A serial/primary key field can not be added to an existing table for some databases"
and then ran "drush up workbench_moderation
One confusion is that workbench_moderation.module went back to the prepatch condition
Tested on another developement site and only had to do the core update.