diff --git a/views/financial_contract_guarantee.xml b/views/financial_contract_guarantee.xml
index 6141e4084166185f311a7f74ef4900f1e07e3d86..368cacaa4e51870c04474a9a26d10c3ef7482b5e 100644
--- a/views/financial_contract_guarantee.xml
+++ b/views/financial_contract_guarantee.xml
@@ -51,7 +51,7 @@
                 <sheet>
                     <group>
                         <group name="customer" string="Coopérative">
-                            <field name="partner_id" />
+                            <field name="partner_id" readonly="state != 'init'"/>
                             <field name="ur_id" />
                             <field name="siren" />
                             <field name="member_number" />