diff --git a/htdocs/install/mysql/migration/3.1.0-3.2.0.sql b/htdocs/install/mysql/migration/3.1.0-3.2.0.sql
index b435e355e51..f2b9a4bbe7f 100755
--- a/htdocs/install/mysql/migration/3.1.0-3.2.0.sql
+++ b/htdocs/install/mysql/migration/3.1.0-3.2.0.sql
@@ -271,6 +271,9 @@ ALTER TABLE llx_adherent_extrafields ADD COLUMN import_key varchar(14);
 ALTER TABLE llx_product_extrafields  ADD COLUMN import_key varchar(14);
 ALTER TABLE llx_societe_extrafields  ADD COLUMN import_key varchar(14);
 
+-- Disable foreign key checks for external modules constraints
+SET FOREIGN_KEY_CHECKS=0;
+
 DROP TABLE llx_c_currencies;
 create table llx_c_currencies
 (
@@ -422,6 +425,8 @@ INSERT INTO llx_c_currencies ( code_iso, unicode, active, label ) VALUES ( 'XEU'
 INSERT INTO llx_c_currencies ( code_iso, unicode, active, label ) VALUES ( 'ARP', NULL, 0,	'Pesos argentins');
 INSERT INTO llx_c_currencies ( code_iso, unicode, active, label ) VALUES ( 'MXP', NULL, 0,	'Pesos Mexicans');
 
+SET FOREIGN_KEY_CHECKS=1;
+
 ALTER TABLE llx_propal ADD CONSTRAINT fk_propal_fk_currency		FOREIGN KEY (fk_currency) REFERENCES llx_c_currencies (code_iso);
 ALTER TABLE llx_commande ADD CONSTRAINT fk_commande_fk_currency	FOREIGN KEY (fk_currency) REFERENCES llx_c_currencies (code_iso);
 ALTER TABLE llx_facture ADD CONSTRAINT fk_facture_fk_currency   FOREIGN KEY (fk_currency) REFERENCES llx_c_currencies (code_iso);