It seems like the delete transaction feature should be only available to user-created test sessions or the admin user. This way, users with their private test session Id will have control over their own transactions but not the "default" or "cat" test sessions.

There are couple of approaches to deleting a simulator transaction log:

1. Deleting a simulator log message could involve removing the document metadata entries from the internal simulator registry index. In this case, future stored query or retrieve requests should not be expected to include any of the deleted metadata. This may be tricky with related metadata associations.

2. Deleting a transaction could mean only to remove the unwanted clutter in the transaction list box but not remove metadata from the simulator indexes.

On a related topic, does archiving simulator log messages mean the metadata is kept intact in the simulator but move Message items from the "Messages" list box to a new "Archived Messages" list box?

I am removing this issue from Milestone 7.8.0 because there is insufficient information to complete this task.