Older studies are not compatible with the latest version of Delve's generation process, which uses more detailed inputs and controls.
You can always change your inputs and rerun your study to create new designs. The new study will support changing designs by adjusting the program of specific blocks, creating parks, and adding or removing floors.
To get more options from a design
For older studies, you can easily rerun your study to get updated design features.
From the Details page, click Rerun your study to get updated design features.
Edit any inputs you want and click Generate Designs.
After your study is complete, you can adjust or change individual designs.
