diff --git a/initialize/migrate/database/02118_traffic_log_idx.up.sql b/initialize/migrate/database/02118_traffic_log_idx.up.sql
index cdd308f..7928a61 100644
--- a/initialize/migrate/database/02118_traffic_log_idx.up.sql
+++ b/initialize/migrate/database/02118_traffic_log_idx.up.sql
@@ -1 +1,2 @@
-ALTER TABLE traffic_log ADD INDEX idx_timestamp (timestamp);
+ALTER TABLE traffic_log ADD INDEX IF NOT EXISTS idx_timestamp (timestamp);
+