Postgres unique constraint violation repo_external_service_unique_idx

Created by: chrismwendt

• Visit https://sourcegraph.com/github.com/lukakerr/Pine
• Notice the error:

Trace: https://app.lightstep.com/sourcegraph-prod/trace?span_guid=608ddd6925155445&at_micros=1552366323485676

pq: duplicate key value violates unique constraint "repo_external_service_unique_idx"