Problem:

When viewing the sum of duration of the Hiring Demo, I received a crash.

Steps to reproduce:

1. Navigate to https://stage.optimize.camunda.cloud/#/collection/9569835b-f994-43af-88a2-b8619f6b0884/report/7b66a03f-490b-427e-abf1-8eb03d7f9a3c/ (exported JSON attached)
2. Create a user task duration heatmap of the Hiring Demo. View SUM, add a goal of 5 days.
3. Try to view the tooltip - enable "Show absolute value" as necessary   

Actual result :

Error message - see above

Expected result:

It should fail gracefully. Trying to compare an unbounded sum to an average doesn't make sense. If it fails, the user should know that feature doesn't have full support. On the off chance that they do want to compare it, we shouldn't disable existing functionality if it's there.