diff --git a/src/AnamClient.ts b/src/AnamClient.ts
index ed56714..579d087 100644
--- a/src/AnamClient.ts
+++ b/src/AnamClient.ts
@@ -119,9 +119,7 @@ export default class AnamClient {
       const tokenType = decodedToken.type?.toLowerCase();
 
       if (tokenType === 'legacy') {
-        if (!personaConfig || !('personaId' in personaConfig)) {
-          return 'Both session token and client are missing a persona configuration. Please provide a persona ID of a saved persona in the personaConfig parameter.';
-        }
+        return 'Legacy session tokens are no longer supported. Please define your persona when creating your session token. See https://docs.anam.ai/resources/migrating-legacy for more information.';
       } else if (tokenType === 'ephemeral' || tokenType === 'stateful') {
         if (personaConfig) {
           return 'This session token already contains a persona configuration. Please remove the personaConfig parameter.';
diff --git a/src/index.ts b/src/index.ts
index 3fee0fa..911e341 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,7 +1,6 @@
 import AnamClient from './AnamClient';
 import { PersonaConfig } from './types';
 import { AnamPublicClientOptions } from './types/AnamPublicClientOptions';
-import { SavedPersonaConfig } from './types/PersonaConfig';
 
 /**
  * Create a new Anam client.
@@ -12,10 +11,9 @@ import { SavedPersonaConfig } from './types/PersonaConfig';
  */
 const createClient = (
   sessionToken: string,
-  personaConfig?: SavedPersonaConfig,
   options?: AnamPublicClientOptions,
 ): AnamClient => {
-  return new AnamClient(sessionToken, personaConfig, options);
+  return new AnamClient(sessionToken, undefined, options);
 };
 
 /**
diff --git a/src/types/AnamPublicClientOptions.ts b/src/types/AnamPublicClientOptions.ts
index 49f5759..21a6c91 100644
--- a/src/types/AnamPublicClientOptions.ts
+++ b/src/types/AnamPublicClientOptions.ts
@@ -1,9 +1,15 @@
 import { CoreApiRestClientOptions } from '../types';
 import { VoiceDetectionOptions } from './VoiceDetectionOptions';
+import { PersonaConfig } from './PersonaConfig';
 
 export interface AnamPublicClientOptions {
   api?: CoreApiRestClientOptions;
   voiceDetection?: VoiceDetectionOptions;
   audioDeviceId?: string;
   disableInputAudio?: boolean;
+  /**
+   * The persona configuration to use.
+   * This is the recommended way to pass persona configuration instead of using the deprecated personaConfig parameter.
+   */
+  personaConfig?: PersonaConfig;
 }
diff --git a/src/types/PersonaConfig.ts b/src/types/PersonaConfig.ts
index 6bc2b59..c022863 100644
--- a/src/types/PersonaConfig.ts
+++ b/src/types/PersonaConfig.ts
@@ -1,12 +1,7 @@
-export type PersonaConfig = SavedPersonaConfig | CustomPersonaConfig;
-
-export interface SavedPersonaConfig {
-  personaId: string;
-  disableBrains?: boolean;
-  disableFillerPhrases?: boolean;
-}
+export type PersonaConfig = CustomPersonaConfig;
 
 export interface CustomPersonaConfig {
+  personaId: string;
   name: string;
   avatarId: string;
   voiceId: string;
@@ -16,12 +11,6 @@ export interface CustomPersonaConfig {
   languageCode?: string;
 }
 
-export function isSavedPersonaConfig(
-  personaConfig: PersonaConfig,
-): personaConfig is SavedPersonaConfig {
-  return 'personaId' in personaConfig;
-}
-
 export function isCustomPersonaConfig(
   personaConfig: PersonaConfig,
 ): personaConfig is CustomPersonaConfig {