With H&M and similar value-based insurance types, you are usually required to make adjustments of insurance values and consequently the rates, at a fixed number of intervals during the insurance year, and based on significant events such as a vessel rebuild.
This have been doable all the time, using the "split period" feature. But some might feel that the insurance period lists became a little too fragmented, say, making a split three times during a regular insurance year.
You are now also allowed to make a value change entry in the insurance event journals. While this actually was possible with version 4.6, and announced to a few project participants, the feature is much more accessible from version 5. The insurance period lists are not touched by this operation.