Test issue detail can not load the Test Runs section if there is a Test Execution of another project associated to it and after the user changes back the configuration of the XRay Test issue

Short Description: An unexpected error (javascript error Cannot read property '_id' of undefined) is displayed in the Test issue details page, not being possible to load the Test Runs section, if there was a Test Execution of another project (classic or next gen) associated to it and after the user changes the configuration of the XRay Test issue to its previous configuration. 

Steps to Reproduce:

1 - In a Next Gen project, create a Test issue.

2 - In the Test issue details, go to the Test Runs section and execute the Test in a new Test Execution but from another project (classic or next gen) or execute the Test in an existent Test Execution but from another project (classic or next gen).

3 - Navigate to the Project Settings - > Next Gen Configuration and change the XRay Test Issue mapping and save it

4 - Now, change back the XRay Test Issue mapping, save the configuration and navigate to the Test issue details

Actual Result: Test Runs section displays an error and can not be loaded. In the console there is the javascript error Cannot read property '_id' of undefined.

Expected Result: The Runs section should load normally and the Test Runs of the other projects should be displayed.