diff --git a/api/controllers/console/app/message.py b/api/controllers/console/app/message.py
index 195a41f2888..f987ecca745 100644
--- a/api/controllers/console/app/message.py
+++ b/api/controllers/console/app/message.py
@@ -167,12 +167,16 @@ register_schema_models(
     ChatMessagesQuery,
     MessageFeedbackPayload,
     FeedbackExportQuery,
+)
+register_response_schema_models(
+    console_ns,
     AnnotationCountResponse,
     SuggestedQuestionsResponse,
     MessageDetailResponse,
     MessageInfiniteScrollPaginationResponse,
+    SimpleResultResponse,
+    TextFileResponse,
 )
-register_response_schema_models(console_ns, SimpleResultResponse, TextFileResponse)
 
 
 @console_ns.route("/apps/<uuid:app_id>/chat-messages")
diff --git a/api/openapi/markdown/console-openapi.md b/api/openapi/markdown/console-openapi.md
index e9c2d0ff775..e7c6fc76480 100644
--- a/api/openapi/markdown/console-openapi.md
+++ b/api/openapi/markdown/console-openapi.md
@@ -13429,7 +13429,6 @@ Soft lifecycle state for Agent records.
 | created_at | integer |  | No |
 | files | [ string ] |  | Yes |
 | id | string |  | Yes |
-| message_chain_id | string |  | No |
 | message_id | string |  | Yes |
 | observation | string |  | No |
 | position | integer |  | Yes |
@@ -14540,8 +14539,8 @@ Enum class for configurate method of provider model.
 | Name | Type | Description | Required |
 | ---- | ---- | ----------- | -------- |
 | annotation_create_account | [SimpleAccount](#simpleaccount) |  | No |
+| annotation_id | string |  | Yes |
 | created_at | integer |  | No |
-| id | string |  | Yes |
 
 #### ConversationDetail
 
@@ -17079,6 +17078,7 @@ Enum class for large language model mode.
 | agent_thoughts | [ [AgentThought](#agentthought) ] |  | No |
 | annotation | [ConversationAnnotation](#conversationannotation) |  | No |
 | annotation_hit_history | [ConversationAnnotationHitHistory](#conversationannotationhithistory) |  | No |
+| answer | string |  | Yes |
 | answer_tokens | integer |  | No |
 | conversation_id | string |  | Yes |
 | created_at | integer |  | No |
@@ -17092,12 +17092,11 @@ Enum class for large language model mode.
 | inputs | object |  | Yes |
 | message | [JSONValue](#jsonvalue) |  | No |
 | message_files | [ [MessageFile](#messagefile) ] |  | No |
-| message_metadata_dict | [JSONValue](#jsonvalue) |  | No |
 | message_tokens | integer |  | No |
+| metadata | [JSONValue](#jsonvalue) |  | No |
 | parent_message_id | string |  | No |
 | provider_response_latency | number |  | No |
 | query | string |  | Yes |
-| re_sign_file_url_answer | string |  | Yes |
 | status | string |  | Yes |
 | workflow_run_id | string |  | No |
 
diff --git a/packages/contracts/generated/api/console/agent/types.gen.ts b/packages/contracts/generated/api/console/agent/types.gen.ts
index 43119c4f1f4..4026c0d35eb 100644
--- a/packages/contracts/generated/api/console/agent/types.gen.ts
+++ b/packages/contracts/generated/api/console/agent/types.gen.ts
@@ -269,6 +269,7 @@ export type MessageDetailResponse = {
   agent_thoughts?: Array<AgentThought>
   annotation?: ConversationAnnotation | null
   annotation_hit_history?: ConversationAnnotationHitHistory | null
+  answer: string
   answer_tokens?: number | null
   conversation_id: string
   created_at?: number | null
@@ -284,12 +285,11 @@ export type MessageDetailResponse = {
   }
   message?: JsonValue | null
   message_files?: Array<MessageFile>
-  message_metadata_dict?: JsonValue | null
   message_tokens?: number | null
+  metadata?: JsonValue | null
   parent_message_id?: string | null
   provider_response_latency?: number | null
   query: string
-  re_sign_file_url_answer: string
   status: string
   workflow_run_id?: string | null
 }
@@ -723,7 +723,6 @@ export type AgentThought = {
   created_at?: number | null
   files: Array<string>
   id: string
-  message_chain_id?: string | null
   message_id: string
   observation?: string | null
   position: number
@@ -743,8 +742,8 @@ export type ConversationAnnotation = {
 
 export type ConversationAnnotationHitHistory = {
   annotation_create_account?: SimpleAccount | null
+  annotation_id: string
   created_at?: number | null
-  id: string
 }
 
 export type HumanInputContent = {
diff --git a/packages/contracts/generated/api/console/agent/zod.gen.ts b/packages/contracts/generated/api/console/agent/zod.gen.ts
index d7f5681ffc4..45a68beb8a6 100644
--- a/packages/contracts/generated/api/console/agent/zod.gen.ts
+++ b/packages/contracts/generated/api/console/agent/zod.gen.ts
@@ -570,7 +570,6 @@ export const zAgentThought = z.object({
   created_at: z.int().nullish(),
   files: z.array(z.string()),
   id: z.string(),
-  message_chain_id: z.string().nullish(),
   message_id: z.string(),
   observation: z.string().nullish(),
   position: z.int(),
@@ -1056,8 +1055,8 @@ export const zConversationAnnotation = z.object({
  */
 export const zConversationAnnotationHitHistory = z.object({
   annotation_create_account: zSimpleAccount.nullish(),
+  annotation_id: z.string(),
   created_at: z.int().nullish(),
-  id: z.string(),
 })
 
 /**
@@ -2035,6 +2034,7 @@ export const zMessageDetailResponse = z.object({
   agent_thoughts: z.array(zAgentThought).optional(),
   annotation: zConversationAnnotation.nullish(),
   annotation_hit_history: zConversationAnnotationHitHistory.nullish(),
+  answer: z.string(),
   answer_tokens: z.int().nullish(),
   conversation_id: z.string(),
   created_at: z.int().nullish(),
@@ -2048,12 +2048,11 @@ export const zMessageDetailResponse = z.object({
   inputs: z.record(z.string(), zJsonValue),
   message: zJsonValue.nullish(),
   message_files: z.array(zMessageFile).optional(),
-  message_metadata_dict: zJsonValue.nullish(),
   message_tokens: z.int().nullish(),
+  metadata: zJsonValue.nullish(),
   parent_message_id: z.string().nullish(),
   provider_response_latency: z.number().nullish(),
   query: z.string(),
-  re_sign_file_url_answer: z.string(),
   status: z.string(),
   workflow_run_id: z.string().nullish(),
 })
diff --git a/packages/contracts/generated/api/console/apps/types.gen.ts b/packages/contracts/generated/api/console/apps/types.gen.ts
index 3e7826b7d6f..aa50ef5c315 100644
--- a/packages/contracts/generated/api/console/apps/types.gen.ts
+++ b/packages/contracts/generated/api/console/apps/types.gen.ts
@@ -472,6 +472,7 @@ export type MessageDetailResponse = {
   agent_thoughts?: Array<AgentThought>
   annotation?: ConversationAnnotation | null
   annotation_hit_history?: ConversationAnnotationHitHistory | null
+  answer: string
   answer_tokens?: number | null
   conversation_id: string
   created_at?: number | null
@@ -487,12 +488,11 @@ export type MessageDetailResponse = {
   }
   message?: JsonValue | null
   message_files?: Array<MessageFile>
-  message_metadata_dict?: JsonValue | null
   message_tokens?: number | null
+  metadata?: JsonValue | null
   parent_message_id?: string | null
   provider_response_latency?: number | null
   query: string
-  re_sign_file_url_answer: string
   status: string
   workflow_run_id?: string | null
 }
@@ -1498,7 +1498,6 @@ export type AgentThought = {
   created_at?: number | null
   files: Array<string>
   id: string
-  message_chain_id?: string | null
   message_id: string
   observation?: string | null
   position: number
@@ -1518,8 +1517,8 @@ export type ConversationAnnotation = {
 
 export type ConversationAnnotationHitHistory = {
   annotation_create_account?: SimpleAccount | null
+  annotation_id: string
   created_at?: number | null
-  id: string
 }
 
 export type HumanInputContent = {
diff --git a/packages/contracts/generated/api/console/apps/zod.gen.ts b/packages/contracts/generated/api/console/apps/zod.gen.ts
index 5265e907333..c64ea73f954 100644
--- a/packages/contracts/generated/api/console/apps/zod.gen.ts
+++ b/packages/contracts/generated/api/console/apps/zod.gen.ts
@@ -1150,7 +1150,6 @@ export const zAgentThought = z.object({
   created_at: z.int().nullish(),
   files: z.array(z.string()),
   id: z.string(),
-  message_chain_id: z.string().nullish(),
   message_id: z.string(),
   observation: z.string().nullish(),
   position: z.int(),
@@ -2349,8 +2348,8 @@ export const zConversationPagination = z.object({
  */
 export const zConversationAnnotationHitHistory = z.object({
   annotation_create_account: zSimpleAccount.nullish(),
+  annotation_id: z.string(),
   created_at: z.int().nullish(),
-  id: z.string(),
 })
 
 /**
@@ -3464,6 +3463,7 @@ export const zMessageDetailResponse = z.object({
   agent_thoughts: z.array(zAgentThought).optional(),
   annotation: zConversationAnnotation.nullish(),
   annotation_hit_history: zConversationAnnotationHitHistory.nullish(),
+  answer: z.string(),
   answer_tokens: z.int().nullish(),
   conversation_id: z.string(),
   created_at: z.int().nullish(),
@@ -3477,12 +3477,11 @@ export const zMessageDetailResponse = z.object({
   inputs: z.record(z.string(), zJsonValue),
   message: zJsonValue.nullish(),
   message_files: z.array(zMessageFile).optional(),
-  message_metadata_dict: zJsonValue.nullish(),
   message_tokens: z.int().nullish(),
+  metadata: zJsonValue.nullish(),
   parent_message_id: z.string().nullish(),
   provider_response_latency: z.number().nullish(),
   query: z.string(),
-  re_sign_file_url_answer: z.string(),
   status: z.string(),
   workflow_run_id: z.string().nullish(),
 })
diff --git a/packages/contracts/generated/api/console/installed-apps/types.gen.ts b/packages/contracts/generated/api/console/installed-apps/types.gen.ts
index f9a5eb01edc..61b1303d5b5 100644
--- a/packages/contracts/generated/api/console/installed-apps/types.gen.ts
+++ b/packages/contracts/generated/api/console/installed-apps/types.gen.ts
@@ -246,7 +246,6 @@ export type AgentThought = {
   created_at?: number | null
   files: Array<string>
   id: string
-  message_chain_id?: string | null
   message_id: string
   observation?: string | null
   position: number
diff --git a/packages/contracts/generated/api/console/installed-apps/zod.gen.ts b/packages/contracts/generated/api/console/installed-apps/zod.gen.ts
index a4556058506..53439d132c8 100644
--- a/packages/contracts/generated/api/console/installed-apps/zod.gen.ts
+++ b/packages/contracts/generated/api/console/installed-apps/zod.gen.ts
@@ -266,7 +266,6 @@ export const zAgentThought = z.object({
   created_at: z.int().nullish(),
   files: z.array(z.string()),
   id: z.string(),
-  message_chain_id: z.string().nullish(),
   message_id: z.string(),
   observation: z.string().nullish(),
   position: z.int(),
diff --git a/web/features/agent-v2/agent-detail/configure/components/preview/chat.tsx b/web/features/agent-v2/agent-detail/configure/components/preview/chat.tsx
index a3127b4bd49..9ad0555d196 100644
--- a/web/features/agent-v2/agent-detail/configure/components/preview/chat.tsx
+++ b/web/features/agent-v2/agent-detail/configure/components/preview/chat.tsx
@@ -217,14 +217,8 @@ const toFeedback = (feedback: NonNullable<MessageDetailResponse['feedbacks']>[nu
   }
 }
 
-type AgentDebugMessageWithLegacyAnswer = MessageDetailResponse & {
-  answer?: string | null
-}
-
 const getAgentDebugMessageAnswer = (message: MessageDetailResponse) => {
-  const legacyAnswer = (message as AgentDebugMessageWithLegacyAnswer).answer
-
-  return message.re_sign_file_url_answer ?? legacyAnswer ?? ''
+  return message.answer ?? ''
 }
 
 function getFormattedAgentDebugChatTree(messages: MessageDetailResponse[]): ChatItemInTree[] {