diff --git a/migrations/v4.go b/migrations/v4.go
index 93bfbc1..403a3f0 100644
--- a/migrations/v4.go
+++ b/migrations/v4.go
@@ -18,8 +18,6 @@ func oauth(db *datastore) error {
 			SetIfNotExists(true).
 			Column(dialect.Column("user_id", wf_db.ColumnTypeInteger, wf_db.UnsetSize)).
 			Column(dialect.Column("remote_user_id", wf_db.ColumnTypeInteger, wf_db.UnsetSize)).
-			UniqueConstraint("user_id").
-			UniqueConstraint("remote_user_id").
 			ToSQL()
 		if err != nil {
 			return err
diff --git a/migrations/v5.go b/migrations/v5.go
index 94e3944..0dc5129 100644
--- a/migrations/v5.go
+++ b/migrations/v5.go
@@ -49,8 +49,6 @@ func oauthSlack(db *datastore) error {
 						"access_token",
 						wf_db.ColumnTypeVarChar,
 						wf_db.OptionalInt{Set: true, Value: 512,})),
-			dialect.DropIndex("remote_user_id", "oauth_users"),
-			dialect.DropIndex("user_id", "oauth_users"),
 			dialect.CreateUniqueIndex("oauth_users", "oauth_users", "user_id", "provider", "client_id"),
 		}
 		for _, builder := range builders {