Bugfix
In the "Administration > Basic administration > Currencies" view, the Create button has the READ command group instead of CREATE:
Code migration
The default command group of com.top_logic.element.layout.grid.GridCreateHandler has been changed from Read to Create. If you really want to create buttons in a view using the Read command group, then group="Read" must be added in this view for buttons with class com.top_logic.element.layout.grid.GridCreateHandler (or any derivatives).