Drop table if exists

src/test/regress/expected/multi_modifying_xacts.out

@@ -1359,6 +1359,7 @@ SELECT create_reference_table('itemgroups');
 
 (1 row)
 
+DROP TABLE IF EXISTS users ;
 CREATE TABLE users (
     id int PRIMARY KEY,
     name text,

src/test/regress/sql/multi_modifying_xacts.sql

@@ -1,4 +1,3 @@
-
 SET citus.next_shard_id TO 1200000;
 SET citus.next_placement_id TO 1200000;
 
@@ -1022,6 +1021,7 @@ CREATE TABLE itemgroups (
 );
 SELECT create_reference_table('itemgroups');
 
+DROP TABLE IF EXISTS users ;
 CREATE TABLE users (
     id int PRIMARY KEY,
     name text,
@@ -1178,4 +1178,4 @@ SELECT name FROM labs WHERE id = 1001;
 RESET citus.function_opens_transaction_block;
 
 DROP FUNCTION insert_abort();
-DROP TABLE items, users, itemgroups, usergroups, researchers, labs;
+DROP TABLE items, users, itemgroups, usergroups, researchers, labs;