Drop model table if exists

pgsql-schema.sql

@@ -38,7 +38,8 @@ CREATE TABLE IF NOT EXISTS ct_logs (
 -- Table used to build the argument list passed by ulog
 -- It contains the flow_{start, end}_{sec, usec} variables
 -- instead of the timestamps
-CREATE TABLE IF NOT EXISTS ulog2_ct_model (
+DROP TABLE IF EXISTS ulog2_ct_model;
+CREATE TABLE ulog2_ct_model (
   ct_id bigint PRIMARY KEY UNIQUE NOT NULL,
   oob_family smallint default NULL,
   orig_ip_saddr_str inet default NULL,