The PersonalInformation_AgeAtStart field in OData is only calculated and displayed under the following conditions:
- The learner's Onboarding Wizard has been initiated (status changed to In Progress).
- The learner's date of birth (DOB) is populated in their profile.
- The learner has a valid Episode/Programme start date.
If any of these conditions are not met—such as the Onboarding Wizard not being initiated, DOB missing in the profile, or the absence of a Programme start date—the PersonalInformation_AgeAtStart field will appear as blank or null in OData.