When checking out a workflow version, questions choices are added to the update set although no changes are made to the question choices.
Steps to Reproduce
Login into OOTB
Create a workflow with a simple activity
Add a workflow variable of type Select Box [record in wf_variable]
Add a choice to the above variable [records in the question_choice]
publish the workflow
Create a New update set and check out the workflow
Now, you will observe in the update set contain records of type - Question Choice.
Manually remove the copied question choice updates from the update set.
Related Problem: PRB1336519