diff --git a/trytond/trytond/model/modelsql.py b/trytond/trytond/model/modelsql.py
index 8be677f820..c104f5aef9 100644
--- a/trytond/trytond/model/modelsql.py
+++ b/trytond/trytond/model/modelsql.py
@@ -553,6 +553,7 @@ class ModelSQL(ModelStorage):
                         gettext('ir.msg_required_validation',
                             **cls.__names__(field_name)))
         for name, _, error in cls._sql_constraints:
+            name = cls._table + '_' + name
             if backend.TableHandler.convert_name(name) in str(exception):
                 raise SQLConstraintError(gettext(error))
         # Check foreign key in last because this can raise false positive