diff --git a/apps/web/public/static/locales/en/common.json b/apps/web/public/static/locales/en/common.json
index 0738b76b95..5bc7990ab0 100644
--- a/apps/web/public/static/locales/en/common.json
+++ b/apps/web/public/static/locales/en/common.json
@@ -3361,5 +3361,6 @@
   "license_validation_failed": "Failed to validate license key",
   "license_key_saved": "License key saved successfully",
   "timezone_mismatch_tooltip": "You are viewing the report based on your profile timezone ({{userTimezone}}), while your browser is set to timezone ({{browserTimezone}})",
+  "event_type_no_hosts": "No hosts are assigned to event type",
   "ADD_NEW_STRINGS_ABOVE_THIS_LINE_TO_PREVENT_MERGE_CONFLICTS": "↑↑↑↑↑↑↑↑↑↑↑↑↑ Add your new strings above here ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑"
 }
diff --git a/packages/features/ee/round-robin/roundRobinReassignment.ts b/packages/features/ee/round-robin/roundRobinReassignment.ts
index 660e91c86b..47bf254593 100644
--- a/packages/features/ee/round-robin/roundRobinReassignment.ts
+++ b/packages/features/ee/round-robin/roundRobinReassignment.ts
@@ -20,6 +20,7 @@ import {
   enrichHostsWithDelegationCredentials,
   enrichUserWithDelegationCredentialsIncludeServiceAccountKey,
 } from "@calcom/lib/delegationCredential/server";
+import { ErrorCode } from "@calcom/lib/errorCodes";
 import { getEventName } from "@calcom/lib/event";
 import { IdempotencyKeyService } from "@calcom/lib/idempotencyKey/idempotencyKeyService";
 import { isPrismaObjOrUndefined } from "@calcom/lib/isPrismaObj";
@@ -99,6 +100,10 @@ export const roundRobinReassignment = async ({
         createdAt: new Date(0), // use earliest possible date as fallback
       }));
 
+  if (eventType.hosts.length === 0) {
+    throw new Error(ErrorCode.EventTypeNoHosts);
+  }
+
   const roundRobinHosts = eventType.hosts.filter((host) => !host.isFixed);
 
   const originalOrganizer = booking.user;
diff --git a/packages/lib/errorCodes.ts b/packages/lib/errorCodes.ts
index 6f7cb7f056..b96691491e 100644
--- a/packages/lib/errorCodes.ts
+++ b/packages/lib/errorCodes.ts
@@ -23,4 +23,5 @@ export enum ErrorCode {
   BookerLimitExceededReschedule = "booker_limit_exceeded_error_reschedule",
   BookingNotAllowedByRestrictionSchedule = "booking_not_allowed_by_restriction_schedule_error",
   RestrictionScheduleNotFound = "restriction_schedule_not_found_error",
+  EventTypeNoHosts = "event_type_no_hosts",
 }
diff --git a/packages/lib/server/getServerErrorFromUnknown.ts b/packages/lib/server/getServerErrorFromUnknown.ts
index abafecdcfc..df5b63f5a4 100644
--- a/packages/lib/server/getServerErrorFromUnknown.ts
+++ b/packages/lib/server/getServerErrorFromUnknown.ts
@@ -111,6 +111,7 @@ function getStatusCode(cause: Error | ErrorWithCode): number {
     case ErrorCode.BookingNotAllowedByRestrictionSchedule:
     case ErrorCode.BookerLimitExceeded:
     case ErrorCode.BookerLimitExceededReschedule:
+    case ErrorCode.EventTypeNoHosts:
       return 400;
     // 409 Conflict
     case ErrorCode.NoAvailableUsersFound: