diff --git a/pkg/compute/models/project_mapping_resource.go b/pkg/compute/models/project_mapping_resource.go
index dc40e0b442..6330b9782a 100644
--- a/pkg/compute/models/project_mapping_resource.go
+++ b/pkg/compute/models/project_mapping_resource.go
@@ -32,7 +32,7 @@ import (
 )
 
 type SProjectMappingResourceBase struct {
-	ProjectMappingId string `width:"36" charset:"ascii" nullable:"false" create:"required"  index:"true" list:"user" json:"project_mapping_id"`
+	ProjectMappingId string `width:"36" charset:"ascii" nullable:"false" create:"optional" index:"true" list:"user" json:"project_mapping_id"`
 }
 
 type SProjectMappingResourceBaseManager struct{}