diff --git a/htdocs/install/mysql/migration/7.0.0-8.0.0.sql b/htdocs/install/mysql/migration/7.0.0-8.0.0.sql
index 21feb62b978..4da1c8cf408 100644
--- a/htdocs/install/mysql/migration/7.0.0-8.0.0.sql
+++ b/htdocs/install/mysql/migration/7.0.0-8.0.0.sql
@@ -43,6 +43,8 @@ ALTER TABLE llx_website_page ADD COLUMN fk_user_create integer;
 ALTER TABLE llx_website_page ADD COLUMN fk_user_modif integer; 
 ALTER TABLE llx_website_page ADD COLUMN type_container varchar(16) NOT NULL DEFAULT 'page';
 
+ALTER TABLE llx_ecm_files DROP INDEX uk_ecm_files;
+ALTER TABLE llx_ecm_files ADD UNIQUE INDEX uk_ecm_files (filepath, filename, entity);
 
 
 -- drop very old table (bad name)
diff --git a/htdocs/install/mysql/tables/llx_ecm_files.key.sql b/htdocs/install/mysql/tables/llx_ecm_files.key.sql
index a55debc9cd0..a73d0251bff 100644
--- a/htdocs/install/mysql/tables/llx_ecm_files.key.sql
+++ b/htdocs/install/mysql/tables/llx_ecm_files.key.sql
@@ -17,7 +17,7 @@
 -- ============================================================================
 
 
-ALTER TABLE llx_ecm_files ADD UNIQUE INDEX uk_ecm_files (filepath, filename);
+ALTER TABLE llx_ecm_files ADD UNIQUE INDEX uk_ecm_files (filepath, filename, entity);
 ALTER TABLE llx_ecm_files ADD INDEX idx_ecm_files_label (label);
 
 --ALTER TABLE llx_ecm_files ADD UNIQUE INDEX uk_ecm_files_fullpath(fullpath); Disabled, mysql limits size of index