What is the issue?
This issue only happens under certain conditions, but when a matrix with recently created/edited entries is renamed, the activity log will break as it still has reference to the old matrix database table.

In the example above, the matrix was renamed from News to Global News
What are the steps to reproduce this issue?
- Create a matrix with a fieldset
- Create an entry
- Rename the matrix
- Attempt to visit the dashboard
What were you expecting to happen?
The reference to the matrix be updated within the activity log.