Potential for two author team members to be created

[Cooryd]

Unsure how this has occurred but a user was unable to submit due to duplicate author role team entries for their submission. Looking at the submission, one author entry had all details and the other only had partial data. This may have been an autosave race condition but unable to tell from the logs or data.

https://elifesciences.slack.com/archives/C6MJK1RD4/p1602589665001100

libero-reviewer--prod-submission-primary-89dc8b468-lkpqf libero-reviewer-submission 2020-10-13T06:57:34.993124616Z {"level":50,"time":1602572254993,"pid":1,"hostname":"libero-reviewer--prod-submission-primary-89dc8b468-lkpqf","service":"reviewer-submission","realm":"infra","msg":"\"author.email\" is not allowed to be empty Error: \"author.email\" is not allowed to be empty\n    at Submission.isSubmittable (/app/dist/domain/submission/services/models/submission.js:58:19)\n    at SubmissionService.submit (/app/dist/domain/submission/services/submission-service.js:76:25)\n    at WizardService.submit (/app/dist/application/wizard/service.js:84:38)","v":1}