diff --git a/mysql/migration/1.1.0-2.0.0.sql b/mysql/migration/1.1.0-2.0.0.sql
index f257c2676e75ab080bdb03bdbe0b5120a389075c..bbdd00b249c3c15d0533c82784e5877c85ecf77d 100644
--- a/mysql/migration/1.1.0-2.0.0.sql
+++ b/mysql/migration/1.1.0-2.0.0.sql
@@ -191,7 +191,6 @@ alter table llx_societe add capital real after tva_intra;
 alter table llx_societe add rubrique varchar(255);
 alter table llx_societe add remise_client real default 0;
 
-update llx_societe set prefix_comm = null where prefix_comm = '';
 update llx_societe set code_client = null where code_client = '';
 ALTER TABLE llx_societe ADD UNIQUE uk_societe_prefix_comm(prefix_comm);
 ALTER TABLE llx_societe ADD UNIQUE uk_societe_code_client(code_client);