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 b97c9a99fe9..9bc9d7b8677 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
@@ -73,7 +73,7 @@ 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);
+--ALTER TABLE llx_ecm_directories ADD UNIQUE INDEX uk_ecm_directories_fullpath(fullpath);
 
 
 CREATE TABLE llx_ecm_files
@@ -96,7 +96,7 @@ CREATE TABLE llx_ecm_files
 ) ENGINE=innodb;
 
 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);
+--ALTER TABLE llx_ecm_files ADD UNIQUE INDEX uk_ecm_files_fullpath(fullpath);
 
 
 ALTER TABLE llx_product ADD COLUMN onportal tinyint DEFAULT 0 after tobuy;
diff --git a/htdocs/install/mysql/tables/llx_ecm_directories.key.sql b/htdocs/install/mysql/tables/llx_ecm_directories.key.sql
index d11985e3be5..2e96a5f8e95 100644
--- a/htdocs/install/mysql/tables/llx_ecm_directories.key.sql
+++ b/htdocs/install/mysql/tables/llx_ecm_directories.key.sql
@@ -18,8 +18,8 @@
 -- ============================================================================
 
 
-ALTER TABLE llx_ecm_directories ADD UNIQUE INDEX idx_ecm_directories (label, fk_parent, entity);
-ALTER TABLE llx_ecm_directories ADD UNIQUE INDEX uk_ecm_directories_fullpath(fullpath);
+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); Disabled, mysql limits size of index
 ALTER TABLE llx_ecm_directories ADD INDEX idx_ecm_directories_fk_user_c (fk_user_c);
 ALTER TABLE llx_ecm_directories ADD INDEX idx_ecm_directories_fk_user_m (fk_user_m);
 
diff --git a/htdocs/install/mysql/tables/llx_ecm_files.key.sql b/htdocs/install/mysql/tables/llx_ecm_files.key.sql
index 81cc769d6cd..9b1f4fcf164 100644
--- a/htdocs/install/mysql/tables/llx_ecm_files.key.sql
+++ b/htdocs/install/mysql/tables/llx_ecm_files.key.sql
@@ -18,4 +18,4 @@
 
 
 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);
+--ALTER TABLE llx_ecm_files ADD UNIQUE INDEX uk_ecm_files_fullpath(fullpath); Disabled, mysql limits size of index