diff --git a/htdocs/install/mysql/migration/3.8.0-3.9.0.sql b/htdocs/install/mysql/migration/3.8.0-3.9.0.sql
index d6378a06c6d..b97c9a99fe9 100755
--- a/htdocs/install/mysql/migration/3.8.0-3.9.0.sql
+++ b/htdocs/install/mysql/migration/3.8.0-3.9.0.sql
@@ -71,6 +71,11 @@ ALTER TABLE llx_contrat ADD COLUMN ref_customer varchar(30);
 
 ALTER TABLE llx_ecm_directories MODIFY COLUMN fullpath varchar(750);
 
+ALTER TABLE llx_ecm_directories DROP INDEX idx_ecm_directories;
+ALTER TABLE llx_ecm_directories ADD UNIQUE INDEX uk_ecm_directories (label, fk_parent, entity);
+ALTER TABLE llx_ecm_directories ADD UNIQUE INDEX uk_ecm_directories_fullpath(fullpath);
+
+
 CREATE TABLE llx_ecm_files
 (
   rowid				integer AUTO_INCREMENT PRIMARY KEY,
@@ -90,8 +95,7 @@ CREATE TABLE llx_ecm_files
   acl				text							-- for future permission 'per file'
 ) ENGINE=innodb;
 
-
-ALTER TABLE llx_ecm_directories ADD UNIQUE INDEX uk_ecm_directories_fullpath(fullpath);
+ALTER TABLE llx_ecm_files ADD UNIQUE INDEX uk_ecm_files (label, entity);
 ALTER TABLE llx_ecm_files ADD UNIQUE INDEX uk_ecm_files_fullpath(fullpath);
 
 
diff --git a/htdocs/install/mysql/tables/llx_ecm_files.key.sql b/htdocs/install/mysql/tables/llx_ecm_files.key.sql
index b689bf0b0fb..81cc769d6cd 100644
--- a/htdocs/install/mysql/tables/llx_ecm_files.key.sql
+++ b/htdocs/install/mysql/tables/llx_ecm_files.key.sql
@@ -17,4 +17,5 @@
 -- ============================================================================
 
 
+ALTER TABLE llx_ecm_files ADD UNIQUE INDEX uk_ecm_files (label, entity);
 ALTER TABLE llx_ecm_files ADD UNIQUE INDEX uk_ecm_files_fullpath(fullpath);