diff --git a/packages/google-cloud-aiplatform/protos/google/cloud/aiplatform/v1beta1/model_monitor.proto b/packages/google-cloud-aiplatform/protos/google/cloud/aiplatform/v1beta1/model_monitor.proto
index 590c17746f1..55a11d312d0 100644
--- a/packages/google-cloud-aiplatform/protos/google/cloud/aiplatform/v1beta1/model_monitor.proto
+++ b/packages/google-cloud-aiplatform/protos/google/cloud/aiplatform/v1beta1/model_monitor.proto
@@ -175,10 +175,4 @@ message ModelMonitoringSchema {
 
   // Target /ground truth names of the model.
   repeated FieldSchema ground_truth_fields = 3;
-
-  // The prediction instance type that the Model accepts when serving.
-  // Supported values are:
-  // * `object`: Each input is a JSON object format.
-  // * `array`: Each input is a JSON array format.
-  string instance_type = 4;
 }
diff --git a/packages/google-cloud-aiplatform/protos/protos.d.ts b/packages/google-cloud-aiplatform/protos/protos.d.ts
index a7461574a9a..d118b92b33a 100644
--- a/packages/google-cloud-aiplatform/protos/protos.d.ts
+++ b/packages/google-cloud-aiplatform/protos/protos.d.ts
@@ -187966,9 +187966,6 @@ export namespace google {
 
                     /** ModelMonitoringSchema groundTruthFields */
                     groundTruthFields?: (google.cloud.aiplatform.v1beta1.ModelMonitoringSchema.IFieldSchema[]|null);
-
-                    /** ModelMonitoringSchema instanceType */
-                    instanceType?: (string|null);
                 }
 
                 /** Represents a ModelMonitoringSchema. */
@@ -187989,9 +187986,6 @@ export namespace google {
                     /** ModelMonitoringSchema groundTruthFields. */
                     public groundTruthFields: google.cloud.aiplatform.v1beta1.ModelMonitoringSchema.IFieldSchema[];
 
-                    /** ModelMonitoringSchema instanceType. */
-                    public instanceType: string;
-
                     /**
                      * Creates a new ModelMonitoringSchema instance using the specified properties.
                      * @param [properties] Properties to set
diff --git a/packages/google-cloud-aiplatform/protos/protos.js b/packages/google-cloud-aiplatform/protos/protos.js
index c28982ea606..e835a1f3650 100644
--- a/packages/google-cloud-aiplatform/protos/protos.js
+++ b/packages/google-cloud-aiplatform/protos/protos.js
@@ -456034,7 +456034,6 @@
                          * @property {Array.<google.cloud.aiplatform.v1beta1.ModelMonitoringSchema.IFieldSchema>|null} [featureFields] ModelMonitoringSchema featureFields
                          * @property {Array.<google.cloud.aiplatform.v1beta1.ModelMonitoringSchema.IFieldSchema>|null} [predictionFields] ModelMonitoringSchema predictionFields
                          * @property {Array.<google.cloud.aiplatform.v1beta1.ModelMonitoringSchema.IFieldSchema>|null} [groundTruthFields] ModelMonitoringSchema groundTruthFields
-                         * @property {string|null} [instanceType] ModelMonitoringSchema instanceType
                          */
     
                         /**
@@ -456079,14 +456078,6 @@
                          */
                         ModelMonitoringSchema.prototype.groundTruthFields = $util.emptyArray;
     
-                        /**
-                         * ModelMonitoringSchema instanceType.
-                         * @member {string} instanceType
-                         * @memberof google.cloud.aiplatform.v1beta1.ModelMonitoringSchema
-                         * @instance
-                         */
-                        ModelMonitoringSchema.prototype.instanceType = "";
-    
                         /**
                          * Creates a new ModelMonitoringSchema instance using the specified properties.
                          * @function create
@@ -456120,8 +456111,6 @@
                             if (message.groundTruthFields != null && message.groundTruthFields.length)
                                 for (var i = 0; i < message.groundTruthFields.length; ++i)
                                     $root.google.cloud.aiplatform.v1beta1.ModelMonitoringSchema.FieldSchema.encode(message.groundTruthFields[i], writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
-                            if (message.instanceType != null && Object.hasOwnProperty.call(message, "instanceType"))
-                                writer.uint32(/* id 4, wireType 2 =*/34).string(message.instanceType);
                             return writer;
                         };
     
@@ -456174,10 +456163,6 @@
                                         message.groundTruthFields.push($root.google.cloud.aiplatform.v1beta1.ModelMonitoringSchema.FieldSchema.decode(reader, reader.uint32()));
                                         break;
                                     }
-                                case 4: {
-                                        message.instanceType = reader.string();
-                                        break;
-                                    }
                                 default:
                                     reader.skipType(tag & 7);
                                     break;
@@ -456240,9 +456225,6 @@
                                         return "groundTruthFields." + error;
                                 }
                             }
-                            if (message.instanceType != null && message.hasOwnProperty("instanceType"))
-                                if (!$util.isString(message.instanceType))
-                                    return "instanceType: string expected";
                             return null;
                         };
     
@@ -456288,8 +456270,6 @@
                                     message.groundTruthFields[i] = $root.google.cloud.aiplatform.v1beta1.ModelMonitoringSchema.FieldSchema.fromObject(object.groundTruthFields[i]);
                                 }
                             }
-                            if (object.instanceType != null)
-                                message.instanceType = String(object.instanceType);
                             return message;
                         };
     
@@ -456311,8 +456291,6 @@
                                 object.predictionFields = [];
                                 object.groundTruthFields = [];
                             }
-                            if (options.defaults)
-                                object.instanceType = "";
                             if (message.featureFields && message.featureFields.length) {
                                 object.featureFields = [];
                                 for (var j = 0; j < message.featureFields.length; ++j)
@@ -456328,8 +456306,6 @@
                                 for (var j = 0; j < message.groundTruthFields.length; ++j)
                                     object.groundTruthFields[j] = $root.google.cloud.aiplatform.v1beta1.ModelMonitoringSchema.FieldSchema.toObject(message.groundTruthFields[j], options);
                             }
-                            if (message.instanceType != null && message.hasOwnProperty("instanceType"))
-                                object.instanceType = message.instanceType;
                             return object;
                         };
     
diff --git a/packages/google-cloud-aiplatform/protos/protos.json b/packages/google-cloud-aiplatform/protos/protos.json
index 101910c02bd..69beeee4bc1 100644
--- a/packages/google-cloud-aiplatform/protos/protos.json
+++ b/packages/google-cloud-aiplatform/protos/protos.json
@@ -49518,10 +49518,6 @@
                           "rule": "repeated",
                           "type": "FieldSchema",
                           "id": 3
-                        },
-                        "instanceType": {
-                          "type": "string",
-                          "id": 4
                         }
                       },
                       "nested": {