diff --git a/htdocs/install/mysql/migration/11.0.0-12.0.0.sql b/htdocs/install/mysql/migration/11.0.0-12.0.0.sql
index 7daf41a05d3..b20d3d9c782 100644
--- a/htdocs/install/mysql/migration/11.0.0-12.0.0.sql
+++ b/htdocs/install/mysql/migration/11.0.0-12.0.0.sql
@@ -64,6 +64,9 @@ create table llx_facturedet_rec_extrafields
 
 ALTER TABLE llx_facturedet_rec_extrafields ADD INDEX idx_facturedet_rec_extrafields (fk_object);
 
+-- This var is per entity now, so we remove const if global if exists
+delete from llx_const where name = 'PROJECT_HIDE_TASKS' and entity = 0;
+
 
 -- For v12