diff --git a/models/physical/olt.go b/models/physical/olt.go
index 721e731..c800ad5 100644
--- a/models/physical/olt.go
+++ b/models/physical/olt.go
@@ -45,7 +45,7 @@
 	Number         int
 	Ports          []PONPort
 	Active         bool
-	Parent         *Chassis `json:"-"`
+	Parent         *Chassis `json:"-" bson:"-"`
 	DataSwitchPort int
 }