Hi Ali

Sorry no one has replied to this - I can give some general guidance even though I don't have much experience in SCORM.

In general if you update an activity it is best to keep it separate from the old one so things don't get mixed up especially with assessments.

You can keep user data by restoring your backed up course - this would keep the data for activities that haven't changed. You can have the old activity and new activity in the same course because some people may not have finished the old activity.

When existing users have finished the old activity you can hide it or delete it so new users can't do this but any user data is retained.

I think any data that is in the SCORM package would be hard to get out and may not be relevant if the activity has changed.

So in my option 2 would usually be the best option.

Craig