diff --git a/src/db/migration/V20161128_1105__mantis7788.sql b/src/db/migration/V20161128_1105__mantis7788.sql
index dc6085439..b30912652 100644
--- a/src/db/migration/V20161128_1105__mantis7788.sql
+++ b/src/db/migration/V20161128_1105__mantis7788.sql
@@ -1,5 +1,10 @@
-ALTER TABLE AG_ADIANTAMENTO_CLIENTE MODIFY (CLIENTE NULL);
-ALTER TABLE AG_ADIANTAMENTO_CLIENTE ADD (CLIENTECNPJCPF VARCHAR2(20));
-ALTER TABLE AG_ADIANTAMENTO_CLIENTE ADD (CLIENTEIDWS VARCHAR2(30));
-ALTER TABLE AG_ADIANTAMENTO_CLIENTE ADD (OBSERVACAO VARCHAR2(255));
-
+declare
+    object_exists exception;
+    pragma exception_init (object_exists , -00955);
+begin
+	execute immediate 'ALTER TABLE AG_ADIANTAMENTO_CLIENTE MODIFY (CLIENTE NULL)';
+	execute immediate 'ALTER TABLE AG_ADIANTAMENTO_CLIENTE ADD (CLIENTECNPJCPF VARCHAR2(20))';
+	execute immediate 'ALTER TABLE AG_ADIANTAMENTO_CLIENTE ADD (CLIENTEIDWS VARCHAR2(30))';
+	execute immediate 'ALTER TABLE AG_ADIANTAMENTO_CLIENTE ADD (OBSERVACAO VARCHAR2(255))';
+    exception when object_exists then null;
+end;
\ No newline at end of file