Redmine

It's probably all activities are used... We created so much fine-grained activities, which after time seems to be to complicated. Now I need delete some activities and merge records into other activities.

For example, we have two activities: Programmer Junior and Programmer Senior. I would like to have only one category: Programmer. SO I would like to rename first category and delete second category. When deleting second category, there should be similar dialog, found in other parts of Redmine: it should ask me what to do with existing records? set different activity from select or leave activity clean...

Is it possible?