Make principal_id a unique field in SyndicatePrincipal
diff --git a/planetstack/syndicate_storage/models.py b/planetstack/syndicate_storage/models.py
index a7e0c90..e2f98be 100644
--- a/planetstack/syndicate_storage/models.py
+++ b/planetstack/syndicate_storage/models.py
@@ -21,7 +21,7 @@
app_label = "syndicate_storage"
# for now, this is a user email address
- principal_id = models.TextField()
+ principal_id = models.TextField(unique=True)
public_key_pem = models.TextField()
sealed_private_key = models.TextField()