diff --git a/src/db/migration/V20180724_1141__mantis11649.sql b/src/db/migration/V20180724_1141__mantis11649.sql
index ae6835c24..97dfed7a0 100644
--- a/src/db/migration/V20180724_1141__mantis11649.sql
+++ b/src/db/migration/V20180724_1141__mantis11649.sql
@@ -1,35 +1,19 @@
 declare
-itemExists number;
-instrucao varchar2(255);
+    indice_nao_existe exception;
+    pragma exception_init (indece_nao_existe , -01418);
 begin
-    itemExists := 0;
-
-    select count(constraint_name) into itemExists 
-    from all_constraints
-    where upper(constraint_name) = upper('TARIFA_UNICA');
-    
-    if itemExists > 0 then
-    execute immediate 'ALTER TABLE TARIFA DROP CONSTRAINT TARIFA_UNICA';
-    end if;
-    
-    
-    select 'DROP INDEX '||OWNER||'.TARIFA_UNICA' into instrucao
-    from all_indexes
-    where upper(index_name) = upper('TARIFA_UNICA');
-    
-    if instrucao is not null then
-        execute immediate instrucao;
-    end if;
-
-end;/
+    execute immediate 'DROP INDEX TARIFA_UNICA';
+    exception when indice_nao_existe then null;
+end;
+/
 
 declare
     column_exists exception;
     pragma exception_init (column_exists , -00001);
 begin
     execute immediate 'CREATE UNIQUE INDEX UNQ_TARIFA ON TARIFA (CASE WHEN ACTIVO = 1 THEN 
-					TRAMO_ID || MARCA_ID || CLASESERVICIO_ID || MONEDA_ID || VIGENCIATARIFA_ID || ORGAOCONCEDENTE_ID || RUTA_ID 
-					ELSE NULL END)';
+     TRAMO_ID || MARCA_ID || CLASESERVICIO_ID || MONEDA_ID || VIGENCIATARIFA_ID || ORGAOCONCEDENTE_ID || RUTA_ID 
+     ELSE NULL END)';
     exception when column_exists then null;
 end;
-/
+/
\ No newline at end of file