This change is designed to make it easier to find errors with tenant transactions. For example maybe the income was associated with the wrong tenant, particularly when there are multiple flatmates. Or maybe it was associated with the wrong property or the amount was wrong.
A new 'Link' has been added to the link button on the tenant details screen called Transactions. This takes the user to the rent periods screen for the selected tenant, but automatically selects the Transactions tab. The transactions tab is like a hidden secret for some people who dont realise it is even there. So this will make it easier to find it.
Also the cashbook screen now shows the tenant code in the 'Details' column for all income entries which are associated with tenants.