Candidate cannot apply due to error 'A record for this legislation already exists for this person.'

Summary: We have a candidate that is an ex-employee who is trying to apply to a posting on our external career site and they are receiving the message "A record for this legislation already exists for this person. (PER-1530190) when trying to submit the application. Has anyone had this error before and how can we proceed?

Version (include the version you are using, if applicable):

23C

Code Snippet (add any code snippets that support your topic, if applicable):

PER-1530190