update logging

listener.go

diff --git a/listener.go b/listener.go
index b1e965a..5f1d50f 100644
--- a/listener.go
+++ b/listener.go
@@ -58,9 +58,10 @@
 	// alter table
 	err = AlterTable(db)
 	if err != nil {
-		log.Error(err.Error())
 		if !strings.Contains(err.Error(), "duplicate") {
 			log.Panicf("Alter table failed: %v", err)
+		} else {
+			log.Info("start with local sqlite DB")
 		}
 	}
 	// ensure that no new database updates are made on old database