This version shared with the customers should ONLY be installed in the Scratch ogrs. This should not be installed in the production org until announced.
...
make sure that the Legal entity has valid accounting periods
enable Delta invoicing on the Admin settings
...
Validation of account periods
...
new Delta Preinvoice generation
assigning of periods in the Preinvoice
Delivery data update
...
New Merge logic
...
Landscape PDF
...
New fields to enhance functionality
...
New source and no cancelation types on the optimizer
...
Billing status improvements
Edit layouts to add new fields of the campaign items, invoices, and invoice items
remove all processes that call the delivery data update function on the invoice object
if you use an optimizer - remove the processes that set optimization source and cancelation modes
if you want to test in-field editing - disable the feature setting “Prevent field changes”
new Delta Preinvoice generation - run preinvoice generation for all your campaign combinations, payment intervals, flexible payment plans and timesheet activities
validate the campaign item billing status and the invoiced amount
If you use Landscape PDF - check the layout
Please read what comes in the next Delta release to have a correct expectation.