diff --git a/generated/efmbondinggroupperformancemonitoringhistorydata.go b/generated/efmbondinggroupperformancemonitoringhistorydata.go
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+/*
+ * Copyright (c) 2018 - present.  Boling Consulting Solutions (bcsw.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ * NOTE: This file was generated, manual edits will be overwritten!
+ *
+ * Generated by 'goCodeGenerator.py':
+ *              https://github.com/cboling/OMCI-parser/README.md
+ */
+
+package generated
+
+import "github.com/deckarep/golang-set"
+
+// EfmBondingGroupPerformanceMonitoringHistoryDataClassID is the 16-bit ID for the OMCI
+// Managed entity EFM bonding group performance monitoring history data
+const EfmBondingGroupPerformanceMonitoringHistoryDataClassID ClassID = ClassID(421)
+
+var efmbondinggroupperformancemonitoringhistorydataBME *ManagedEntityDefinition
+
+// EfmBondingGroupPerformanceMonitoringHistoryData (class ID #421)
+//	This ME collects PM data as seen at the xTU-C. Instances of this ME are created and deleted by
+//	the OLT.
+//
+//	Relationships
+//		An instance of this ME is associated with an xDSL UNI.
+//
+//	Attributes
+//		Managed Entity Id
+//			Managed entity ID: This attribute uniquely identifies each instance of this ME. Through an
+//			identical ID, this ME is implicitly linked to an instance of the EFM bonding group. (R,
+//			setbycreate) (mandatory) (2-bytes)
+//
+//		Interval End Time
+//			Interval end time: This attribute identifies the most recently finished 15-min interval. (R)
+//			(mandatory) (1-byte)
+//
+//		Threshold Data 1_2 Id
+//			Threshold data 1/2 ID: This attribute points to an instance of the threshold data 1 and 2 MEs
+//			that contain PM threshold values. (R,-W, setbycreate) (mandatory) (2-bytes)
+//
+//		Rx Bad Fragments
+//			Rx bad fragments: Clause 45.2.3.33 of [IEEE 802.3]. (R) (mandatory) (4-bytes)
+//
+//		Rx Lost Fragments
+//			Rx lost fragments: Clause 45.2.3.34 of [IEEE 802.3]. (R) (mandatory) (4-bytes)
+//
+//		Rx Lost Starts
+//			Rx lost starts: Clause 45.2.3.35 of [IEEE 802.3]. (R) (mandatory) (4-bytes)
+//
+//		Rx Lost Ends
+//			Rx lost ends: Clause 45.2.3.36 of [IEEE 802.3]. (R) (mandatory) (4-bytes)
+//
+//		Rx Frames
+//			Rx frames: Number of Ethernet frames received over this group. (R) (mandatory) (4-bytes)
+//
+//		Tx Frames
+//			Tx frames: Number of Ethernet frames transmitted over this group. (R) (mandatory) (4-bytes)
+//
+//		Rx Bytes
+//			Rx bytes: Number of bytes contained in the Ethernet frames received over this group. (R)
+//			(mandatory) (8-bytes)
+//
+//		Tx Bytes
+//			Tx bytes: Number of bytes contained in the Ethernet frames transmitted over this group. (R)
+//			(mandatory) (8-bytes)
+//
+//		Tx Discarded Frames
+//			Tx discarded frames: Number of Ethernet frames discarded by the group transmit function. (R)
+//			(mandatory) (4-bytes)
+//
+//		Tx Discarded Bytes
+//			Tx discarded bytes: Number of bytes contained in the Ethernet frames discarded by the group
+//			transmit function. (R) (mandatory) (4-bytes)
+//
+type EfmBondingGroupPerformanceMonitoringHistoryData struct {
+	ManagedEntityDefinition
+	Attributes AttributeValueMap
+}
+
+func init() {
+	efmbondinggroupperformancemonitoringhistorydataBME = &ManagedEntityDefinition{
+		Name:    "EfmBondingGroupPerformanceMonitoringHistoryData",
+		ClassID: 421,
+		MessageTypes: mapset.NewSetWith(
+			Create,
+			Delete,
+			Get,
+			Set,
+		),
+		AllowedAttributeMask: 0xfff0,
+		AttributeDefinitions: AttributeDefinitionMap{
+			0:  Uint16Field("ManagedEntityId", PointerAttributeType, 0x0000, 0, mapset.NewSetWith(Read, SetByCreate), false, false, false, 0),
+			1:  ByteField("IntervalEndTime", UnsignedIntegerAttributeType, 0x8000, 0, mapset.NewSetWith(Read), false, false, false, 1),
+			2:  Uint16Field("ThresholdData12Id", UnsignedIntegerAttributeType, 0x4000, 0, mapset.NewSetWith(Read, SetByCreate, Write), false, false, false, 2),
+			3:  Uint32Field("RxBadFragments", CounterAttributeType, 0x2000, 0, mapset.NewSetWith(Read), false, false, false, 3),
+			4:  Uint32Field("RxLostFragments", CounterAttributeType, 0x1000, 0, mapset.NewSetWith(Read), false, false, false, 4),
+			5:  Uint32Field("RxLostStarts", CounterAttributeType, 0x0800, 0, mapset.NewSetWith(Read), false, false, false, 5),
+			6:  Uint32Field("RxLostEnds", CounterAttributeType, 0x0400, 0, mapset.NewSetWith(Read), false, false, false, 6),
+			7:  Uint32Field("RxFrames", CounterAttributeType, 0x0200, 0, mapset.NewSetWith(Read), false, false, false, 7),
+			8:  Uint32Field("TxFrames", CounterAttributeType, 0x0100, 0, mapset.NewSetWith(Read), false, false, false, 8),
+			9:  Uint64Field("RxBytes", CounterAttributeType, 0x0080, 0, mapset.NewSetWith(Read), false, false, false, 9),
+			10: Uint64Field("TxBytes", CounterAttributeType, 0x0040, 0, mapset.NewSetWith(Read), false, false, false, 10),
+			11: Uint32Field("TxDiscardedFrames", CounterAttributeType, 0x0020, 0, mapset.NewSetWith(Read), false, false, false, 11),
+			12: Uint32Field("TxDiscardedBytes", CounterAttributeType, 0x0010, 0, mapset.NewSetWith(Read), false, false, false, 12),
+		},
+		Access:  CreatedByOlt,
+		Support: UnknownSupport,
+	}
+}
+
+// NewEfmBondingGroupPerformanceMonitoringHistoryData (class ID 421) creates the basic
+// Managed Entity definition that is used to validate an ME of this type that
+// is received from or transmitted to the OMCC.
+func NewEfmBondingGroupPerformanceMonitoringHistoryData(params ...ParamData) (*ManagedEntity, OmciErrors) {
+	return NewManagedEntity(*efmbondinggroupperformancemonitoringhistorydataBME, params...)
+}