diff --git a/sql/import.sql b/sql/import.sql
index 96e13e0..213ca4e 100644
--- a/sql/import.sql
+++ b/sql/import.sql
@@ -322,30 +322,30 @@ WHERE household_composition_type1 IS NOT NULL ;
 
 -- Undo 46.
 DELETE FROM chill_person_household_composition c USING import.personnes ip WHERE c.household_id = ip.person_id;
-SELECT setval('chill_person_household_composition_id_seq', (SELECT max(id) FROM chill_person_household_composition));
+SELECT setval('chill_person_household_composition_id_seq', (SELECT COALESCE(max(id),1) FROM chill_person_household_composition));
 
 -- Undo 45.
-DELETE FROM chill_person_household_to_addresses hhaddr USING import.personnes ip WHERE hhaddr.household_id = ip.person_id ;
+DELETE FROM chill_person_household_to_addresses hhaddr USING import.personnes ip WHERE hhaddr.household_id = ip.person_id;
 
 -- Undo 44.
 DELETE FROM chill_person_household_members memb USING import.personnes ip WHERE memb.person_id = ip.person_id;
-SELECT setval('chill_person_household_members_id_seq', (SELECT max(id) FROM chill_person_household_members));
+SELECT setval('chill_person_household_members_id_seq', (SELECT COALESCE(max(id),1) FROM chill_person_household_members));
 DELETE FROM chill_person_household hh USING import.personnes ip WHERE hh.id = ip.person_id;
-SELECT setval('chill_person_household_id_seq', (SELECT max(id) FROM chill_person_household));
+SELECT setval('chill_person_household_id_seq', (SELECT COALESCE(max(id),1) FROM chill_person_household));
 
 -- Undo 43.
 DELETE FROM chill_main_address addr USING import.personnes ip WHERE addr.id = ip.address_id;
-SELECT setval('chill_main_address_id_seq', (SELECT max(id) FROM chill_main_address));
+SELECT setval('chill_main_address_id_seq', (SELECT COALESCE(max(id),1) FROM chill_main_address));
 ALTER TABLE import.personnes DROP column postcode_id;
 ALTER TABLE import.personnes DROP column address_id;
 
 -- Undo 42.
 DELETE FROM chill_person_person_center_history hist USING import.personnes ip WHERE hist.person_id = ip.person_id;
-SELECT setval('chill_person_person_center_history_id_seq', (SELECT max(id) FROM chill_person_person_center_history));
+SELECT setval('chill_person_person_center_history_id_seq', (SELECT COALESCE(max(id),1) FROM chill_person_person_center_history));
 
 -- Undo 41.
 DELETE FROM chill_person_person p USING import.personnes ip WHERE p.id = ip.person_id;
-SELECT setval('chill_person_person_id_seq', (SELECT max(id) FROM chill_person_person));
+SELECT setval('chill_person_person_id_seq', (SELECT COALESCE(max(id),1) FROM chill_person_person));
 
 -- Undo 40.
 ALTER TABLE import.personnes DROP COLUMN person_id;