Change Key

You can change the Flowbuilder Starting Key by clicking Change Key button on the utilities buttons (top left of the page).
Choose your Flowbuilder Starting Key, then click Save button.
After that, all your content will have starting key based on your updates. And please remember this also change all keys as the identifier for the content. Example: your default starting key was CM#, so you have your content keys like: CM#1, CM#2, then you change the starting key to APP#, so now your content key will be: APP#1, APP#2.