diff --git a/googleapis/cloud/automl/v1/annotation_payload.pb.go b/googleapis/cloud/automl/v1/annotation_payload.pb.go
index e707fc2fd..5163746b1 100644
--- a/googleapis/cloud/automl/v1/annotation_payload.pb.go
+++ b/googleapis/cloud/automl/v1/annotation_payload.pb.go
@@ -58,7 +58,7 @@ type AnnotationPayload struct {
 	// ancestor dataset, or the dataset that was used to train the model in use.
 	AnnotationSpecId string `protobuf:"bytes,1,opt,name=annotation_spec_id,json=annotationSpecId,proto3" json:"annotation_spec_id,omitempty"`
 	// Output only. The value of
-	// [display_name][google.cloud.automl.v1p1beta.AnnotationSpec.display_name]
+	// [display_name][google.cloud.automl.v1.AnnotationSpec.display_name]
 	// when the model was trained. Because this field returns a value at model
 	// training time, for different models trained using the same dataset, the
 	// returned value could be different as model owner could update the
@@ -200,24 +200,24 @@ var file_google_cloud_automl_v1_annotation_payload_proto_rawDesc = []byte{
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diff --git a/googleapis/cloud/automl/v1/annotation_spec.pb.go b/googleapis/cloud/automl/v1/annotation_spec.pb.go
index ebc2bb4f8..7c5e70cf3 100644
--- a/googleapis/cloud/automl/v1/annotation_spec.pb.go
+++ b/googleapis/cloud/automl/v1/annotation_spec.pb.go
@@ -114,10 +114,10 @@ var file_google_cloud_automl_v1_annotation_spec_proto_rawDesc = []byte{
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diff --git a/googleapis/cloud/automl/v1/data_items.pb.go b/googleapis/cloud/automl/v1/data_items.pb.go
index 8d9dddff6..56e3a5a76 100644
--- a/googleapis/cloud/automl/v1/data_items.pb.go
+++ b/googleapis/cloud/automl/v1/data_items.pb.go
@@ -685,21 +685,21 @@ var file_google_cloud_automl_v1_data_items_proto_rawDesc = []byte{
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diff --git a/googleapis/cloud/automl/v1/dataset.pb.go b/googleapis/cloud/automl/v1/dataset.pb.go
index ef7d3b84f..23da054ad 100644
--- a/googleapis/cloud/automl/v1/dataset.pb.go
+++ b/googleapis/cloud/automl/v1/dataset.pb.go
@@ -266,20 +266,20 @@ var file_google_cloud_automl_v1_dataset_proto_rawDesc = []byte{
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diff --git a/googleapis/cloud/automl/v1/detection.pb.go b/googleapis/cloud/automl/v1/detection.pb.go
index 1cfd2a8c0..9b8d533c5 100644
--- a/googleapis/cloud/automl/v1/detection.pb.go
+++ b/googleapis/cloud/automl/v1/detection.pb.go
@@ -323,12 +323,12 @@ var file_google_cloud_automl_v1_detection_proto_rawDesc = []byte{
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diff --git a/googleapis/cloud/automl/v1/image.pb.go b/googleapis/cloud/automl/v1/image.pb.go
index bc701d108..d07ebf75f 100644
--- a/googleapis/cloud/automl/v1/image.pb.go
+++ b/googleapis/cloud/automl/v1/image.pb.go
@@ -531,20 +531,20 @@ var file_google_cloud_automl_v1_image_proto_rawDesc = []byte{
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diff --git a/googleapis/cloud/automl/v1/io.pb.go b/googleapis/cloud/automl/v1/io.pb.go
index c69c662aa..ce7ebcced 100644
--- a/googleapis/cloud/automl/v1/io.pb.go
+++ b/googleapis/cloud/automl/v1/io.pb.go
@@ -1799,11 +1799,11 @@ var file_google_cloud_automl_v1_io_proto_rawDesc = []byte{
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diff --git a/googleapis/cloud/automl/v1/model.pb.go b/googleapis/cloud/automl/v1/model.pb.go
index bf57909dc..89b2d25a3 100644
--- a/googleapis/cloud/automl/v1/model.pb.go
+++ b/googleapis/cloud/automl/v1/model.pb.go
@@ -329,20 +329,20 @@ var file_google_cloud_automl_v1_model_proto_rawDesc = []byte{
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diff --git a/googleapis/cloud/automl/v1/model_evaluation.pb.go b/googleapis/cloud/automl/v1/model_evaluation.pb.go
index 03ae3bec2..b17c19940 100644
--- a/googleapis/cloud/automl/v1/model_evaluation.pb.go
+++ b/googleapis/cloud/automl/v1/model_evaluation.pb.go
@@ -247,26 +247,26 @@ var file_google_cloud_automl_v1_model_evaluation_proto_rawDesc = []byte{
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diff --git a/googleapis/cloud/automl/v1/operations.pb.go b/googleapis/cloud/automl/v1/operations.pb.go
index 415813d8a..96d6a0c95 100644
--- a/googleapis/cloud/automl/v1/operations.pb.go
+++ b/googleapis/cloud/automl/v1/operations.pb.go
@@ -869,28 +869,28 @@ var file_google_cloud_automl_v1_operations_proto_rawDesc = []byte{
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diff --git a/googleapis/cloud/automl/v1/text.pb.go b/googleapis/cloud/automl/v1/text.pb.go
index e3333ed77..cf781c159 100644
--- a/googleapis/cloud/automl/v1/text.pb.go
+++ b/googleapis/cloud/automl/v1/text.pb.go
@@ -311,14 +311,14 @@ var file_google_cloud_automl_v1_text_proto_rawDesc = []byte{
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diff --git a/googleapis/cloud/automl/v1/text_extraction.pb.go b/googleapis/cloud/automl/v1/text_extraction.pb.go
index 4f63998c6..a9648ba55 100644
--- a/googleapis/cloud/automl/v1/text_extraction.pb.go
+++ b/googleapis/cloud/automl/v1/text_extraction.pb.go
@@ -262,11 +262,11 @@ var file_google_cloud_automl_v1_text_extraction_proto_rawDesc = []byte{
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diff --git a/googleapis/cloud/automl/v1/text_sentiment.pb.go b/googleapis/cloud/automl/v1/text_sentiment.pb.go
index 5cb3ac53c..885fbf57a 100644
--- a/googleapis/cloud/automl/v1/text_sentiment.pb.go
+++ b/googleapis/cloud/automl/v1/text_sentiment.pb.go
@@ -221,11 +221,11 @@ var file_google_cloud_automl_v1_text_sentiment_proto_rawDesc = []byte{
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+	0x3a, 0x3a, 0x41, 0x75, 0x74, 0x6f, 0x4d, 0x4c, 0x3a, 0x3a, 0x56, 0x31, 0x62, 0x06, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/googleapis/cloud/automl/v1/translation.pb.go b/googleapis/cloud/automl/v1/translation.pb.go
index e3afcd27d..269860759 100644
--- a/googleapis/cloud/automl/v1/translation.pb.go
+++ b/googleapis/cloud/automl/v1/translation.pb.go
@@ -280,13 +280,13 @@ var file_google_cloud_automl_v1_translation_proto_rawDesc = []byte{
 	0x75, 0x74, 0x6f, 0x6d, 0x6c, 0x2f, 0x76, 0x31, 0x2f, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x6c, 0x61,
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 	0x74, 0x4d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0x12, 0x35, 0x0a, 0x14, 0x73, 0x6f, 0x75,
 	0x72, 0x63, 0x65, 0x5f, 0x6c, 0x61, 0x6e, 0x67, 0x75, 0x61, 0x67, 0x65, 0x5f, 0x63, 0x6f, 0x64,
diff --git a/googleapis/maps/fleetengine/v1/trip_api.pb.go b/googleapis/maps/fleetengine/v1/trip_api.pb.go
index 2ad76190b..7f90a1f83 100644
--- a/googleapis/maps/fleetengine/v1/trip_api.pb.go
+++ b/googleapis/maps/fleetengine/v1/trip_api.pb.go
@@ -109,14 +109,14 @@ type CreateTripRequest struct {
 	// this call is a member.
 	Parent string `protobuf:"bytes,3,opt,name=parent,proto3" json:"parent,omitempty"`
 	// Required. Unique Trip ID; must be unique per provider.
-	// Subject to the following normalization and restrictions:
+	// Subject to the following restrictions:
 	//
-	// 1. IDs must be valid Unicode strings.
+	// 1. IDs must not contain any of the following ASCII characters: '/', ':',
+	// '?', or '#'.
 	// 2. IDs are limited to a maximum length of 64 characters.
-	// 3. IDs will be normalized according to Unicode Normalization Form C
+	// 3. IDs must be valid Unicode strings.
+	// 4. IDs must be normalized according to Unicode Normalization Form C
 	// (http://www.unicode.org/reports/tr15/).
-	// 4. IDs may not contain any of the following ASCII characters: '/', ':',
-	// '\\', '?', or '#'.
 	TripId string `protobuf:"bytes,5,opt,name=trip_id,json=tripId,proto3" json:"trip_id,omitempty"`
 	// Required. Trip entity to create.
 	//
diff --git a/googleapis/maps/fleetengine/v1/vehicle_api.pb.go b/googleapis/maps/fleetengine/v1/vehicle_api.pb.go
index 0c4a612c4..efa7702bd 100644
--- a/googleapis/maps/fleetengine/v1/vehicle_api.pb.go
+++ b/googleapis/maps/fleetengine/v1/vehicle_api.pb.go
@@ -192,14 +192,14 @@ type CreateVehicleRequest struct {
 	// this call is a member.
 	Parent string `protobuf:"bytes,3,opt,name=parent,proto3" json:"parent,omitempty"`
 	// Required. Unique Vehicle ID; must be unique per provider.
-	// Subject to the following normalization and restrictions:
+	// Subject to the following restrictions:
 	//
-	// 1. IDs must be valid Unicode strings.
+	// 1. IDs must not contain any of the following ASCII characters: '/', ':',
+	// '?', or '#'.
 	// 2. IDs are limited to a maximum length of 64 characters.
-	// 3. IDs will be normalized according to Unicode Normalization Form C
+	// 3. IDs must be valid Unicode strings.
+	// 4. IDs must be normalized according to Unicode Normalization Form C
 	// (http://www.unicode.org/reports/tr15/).
-	// 4. IDs may not contain any of the following ASCII characters: '/', ':',
-	// '\\', '?', or '#'.
 	VehicleId string `protobuf:"bytes,4,opt,name=vehicle_id,json=vehicleId,proto3" json:"vehicle_id,omitempty"`
 	// Required. The Vehicle entity to create. When creating a Vehicle, the following
 	// fields are required:
@@ -783,15 +783,6 @@ type SearchVehiclesRequest struct {
 	// The default value is `false`.
 	IncludeBackToBack bool `protobuf:"varint,18,opt,name=include_back_to_back,json=includeBackToBack,proto3" json:"include_back_to_back,omitempty"`
 	// Indicates the trip associated with this `SearchVehicleRequest`.
-	// Unique Trip ID; must be unique per provider.
-	// Subject to the following normalization and restrictions:
-	//
-	// 1. IDs must be valid Unicode strings.
-	// 2. IDs are limited to a maximum length of 64 characters.
-	// 3. IDs will be normalized according to Unicode Normalization Form C
-	// (http://www.unicode.org/reports/tr15/).
-	// 4. IDs may not contain any of the following ASCII characters: '/', ':',
-	// '\\', '?', or '#'.
 	TripId string `protobuf:"bytes,19,opt,name=trip_id,json=tripId,proto3" json:"trip_id,omitempty"`
 }
 
diff --git a/googleapis/maps/fleetengine/v1/vehicles.pb.go b/googleapis/maps/fleetengine/v1/vehicles.pb.go
index 75e7a9c8d..87a995d01 100644
--- a/googleapis/maps/fleetengine/v1/vehicles.pb.go
+++ b/googleapis/maps/fleetengine/v1/vehicles.pb.go
@@ -425,7 +425,7 @@ type Vehicle struct {
 	// considered in this value. This value must be greater than or equal to one.
 	MaximumCapacity int32 `protobuf:"varint,6,opt,name=maximum_capacity,json=maximumCapacity,proto3" json:"maximum_capacity,omitempty"`
 	// List of vehicle attributes. A vehicle can have at most 50
-	// attributes.
+	// attributes, and each attribute has a unique key.
 	Attributes []*VehicleAttribute `protobuf:"bytes,8,rep,name=attributes,proto3" json:"attributes,omitempty"`
 	// The type of this vehicle.  Can be used to filter vehicles in
 	// `SearchVehicles` results.  Also influences ETA and route calculations.
diff --git a/regen.txt b/regen.txt
index 507f7f280..4d1dfc962 100644
--- a/regen.txt
+++ b/regen.txt
@@ -1 +1 @@
-5438a17c9bcedf933854df8eb288ab300cc70a1d
\ No newline at end of file
+8c42b6d576d865d40398cd67ed37215748721868
\ No newline at end of file