We are faced with the issue where we can't save our Perfstack project - save button is inactive after adding entities.
Step 1: Loading a project:

Step 2: Project is loaded. Project contains 3 entities with 2 metrics for each.

Step 3: Adding new entity:

Step 4: Adding new graphs:

Save button is inactive - project can't be saved with latest modifications.
Save As button is useless - it's not possible to save project under the same name.

How to fix this? I want to modify Perfstack project and ofc not creating a new one.