Improve sql database upgrade

application/src/main/java/org/thingsboard/server/service/install/SqlDatabaseUpgradeService.java

@@ -477,7 +477,7 @@ public class SqlDatabaseUpgradeService implements DatabaseEntitiesUpgradeService
                     loadSql(schemaUpdateFile, conn);
                     try {
                         conn.createStatement().execute("insert into entity_alarm(tenant_id, entity_id, created_time, alarm_type, customer_id, alarm_id)" +
-                                " select tenant_id, originator_id, created_time, type, customer_id, id from alarm;");
+                                " select tenant_id, originator_id, created_time, type, customer_id, id from alarm ON CONFLICT DO NOTHING;");
                         conn.createStatement().execute("insert into entity_alarm(tenant_id, entity_id, created_time, alarm_type, customer_id, alarm_id)" +
                                 " select a.tenant_id, r.from_id, created_time, type, customer_id, id" +
                                 " from alarm a inner join relation r on r.relation_type_group = 'ALARM' and r.relation_type = 'ANY' and a.id = r.to_id ON CONFLICT DO NOTHING;");