diff --git a/clients/client-ec2/src/commands/CreateFleetCommand.ts b/clients/client-ec2/src/commands/CreateFleetCommand.ts
index 6fce8b58713f..5e627dba53e8 100644
--- a/clients/client-ec2/src/commands/CreateFleetCommand.ts
+++ b/clients/client-ec2/src/commands/CreateFleetCommand.ts
@@ -60,7 +60,7 @@ export interface CreateFleetCommandOutput extends CreateFleetResult, __MetadataB
  *   OnDemandOptions: { // OnDemandOptionsRequest
  *     AllocationStrategy: "lowest-price" || "prioritized",
  *     CapacityReservationOptions: { // CapacityReservationOptionsRequest
- *       UsageStrategy: "use-capacity-reservations-first" || "use-capacity-reservations-only" || "none",
+ *       UsageStrategy: "use-capacity-reservations-first",
  *     },
  *     SingleInstanceType: true || false,
  *     SingleAvailabilityZone: true || false,
diff --git a/clients/client-ec2/src/commands/DescribeFleetsCommand.ts b/clients/client-ec2/src/commands/DescribeFleetsCommand.ts
index 0251eab9a682..e571f9138f6a 100644
--- a/clients/client-ec2/src/commands/DescribeFleetsCommand.ts
+++ b/clients/client-ec2/src/commands/DescribeFleetsCommand.ts
@@ -193,7 +193,7 @@ export interface DescribeFleetsCommandOutput extends DescribeFleetsResult, __Met
  * //       OnDemandOptions: { // OnDemandOptions
  * //         AllocationStrategy: "lowest-price" || "prioritized",
  * //         CapacityReservationOptions: { // CapacityReservationOptions
- * //           UsageStrategy: "use-capacity-reservations-first" || "use-capacity-reservations-only" || "none",
+ * //           UsageStrategy: "use-capacity-reservations-first",
  * //         },
  * //         SingleInstanceType: true || false,
  * //         SingleAvailabilityZone: true || false,
diff --git a/clients/client-ec2/src/models/models_1.ts b/clients/client-ec2/src/models/models_1.ts
index 782d74f8ceff..fac0356a6220 100644
--- a/clients/client-ec2/src/models/models_1.ts
+++ b/clients/client-ec2/src/models/models_1.ts
@@ -4045,9 +4045,7 @@ export type FleetOnDemandAllocationStrategy =
  * @enum
  */
 export const FleetCapacityReservationUsageStrategy = {
-  NONE: "none",
   USE_CAPACITY_RESERVATIONS_FIRST: "use-capacity-reservations-first",
-  USE_CAPACITY_RESERVATIONS_ONLY: "use-capacity-reservations-only",
 } as const;
 
 /**
diff --git a/codegen/sdk-codegen/aws-models/ec2.json b/codegen/sdk-codegen/aws-models/ec2.json
index dc9c4de6089b..df9bd051a2e9 100644
--- a/codegen/sdk-codegen/aws-models/ec2.json
+++ b/codegen/sdk-codegen/aws-models/ec2.json
@@ -50631,18 +50631,6 @@
           "traits": {
             "smithy.api#enumValue": "use-capacity-reservations-first"
           }
-        },
-        "USE_CAPACITY_RESERVATIONS_ONLY": {
-          "target": "smithy.api#Unit",
-          "traits": {
-            "smithy.api#enumValue": "use-capacity-reservations-only"
-          }
-        },
-        "NONE": {
-          "target": "smithy.api#Unit",
-          "traits": {
-            "smithy.api#enumValue": "none"
-          }
         }
       }
     },