Not able to submit the request info form unless Disability category is selected

Summary:

In the request information form triggered to candidate, once the candidate selects yes/no in the 'Do you have a disability' question, and tries to submit the form without selecting the disability category, they are not able to submit the form even though this category field is not mandatory. This message- "The disability category doesn't exist. (PER-1530147)" pops up. Please refer the screenshot attached.

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