diff --git a/api/core/workflow/nodes/agent/agent_node.py b/api/core/workflow/nodes/agent/agent_node.py
index a4616eda6..704eb6a3a 100644
--- a/api/core/workflow/nodes/agent/agent_node.py
+++ b/api/core/workflow/nodes/agent/agent_node.py
@@ -270,7 +270,14 @@ class AgentNode(BaseNode):
                         )
 
                         extra = tool.get("extra", {})
-                        runtime_variable_pool = variable_pool if self._node_data.version != "1" else None
+
+                        # This is an issue that caused problems before.
+                        # Logically, we shouldn't use the node_data.version field for judgment
+                        # But for backward compatibility with historical data
+                        # this version field judgment is still preserved here.
+                        runtime_variable_pool: VariablePool | None = None
+                        if node_data.version != "1" or node_data.tool_node_version != "1":
+                            runtime_variable_pool = variable_pool
                         tool_runtime = ToolManager.get_agent_tool_runtime(
                             self.tenant_id, self.app_id, entity, self.invoke_from, runtime_variable_pool
                         )
diff --git a/api/core/workflow/nodes/agent/entities.py b/api/core/workflow/nodes/agent/entities.py
index 075a41fb2..11b11068e 100644
--- a/api/core/workflow/nodes/agent/entities.py
+++ b/api/core/workflow/nodes/agent/entities.py
@@ -13,6 +13,10 @@ class AgentNodeData(BaseNodeData):
     agent_strategy_name: str
     agent_strategy_label: str  # redundancy
     memory: MemoryConfig | None = None
+    # The version of the tool parameter.
+    # If this value is None, it indicates this is a previous version
+    # and requires using the legacy parameter parsing rules.
+    tool_node_version: str | None = None
 
     class AgentInput(BaseModel):
         value: Union[list[str], list[ToolSelector], Any]
diff --git a/api/core/workflow/nodes/node_mapping.py b/api/core/workflow/nodes/node_mapping.py
index ccfaec4a8..294b47670 100644
--- a/api/core/workflow/nodes/node_mapping.py
+++ b/api/core/workflow/nodes/node_mapping.py
@@ -73,6 +73,9 @@ NODE_TYPE_CLASSES_MAPPING: Mapping[NodeType, Mapping[str, type[BaseNode]]] = {
     },
     NodeType.TOOL: {
         LATEST_VERSION: ToolNode,
+        # This is an issue that caused problems before.
+        # Logically, we shouldn't use two different versions to point to the same class here,
+        # but in order to maintain compatibility with historical data, this approach has been retained.
         "2": ToolNode,
         "1": ToolNode,
     },
@@ -123,6 +126,9 @@ NODE_TYPE_CLASSES_MAPPING: Mapping[NodeType, Mapping[str, type[BaseNode]]] = {
     },
     NodeType.AGENT: {
         LATEST_VERSION: AgentNode,
+        # This is an issue that caused problems before.
+        # Logically, we shouldn't use two different versions to point to the same class here,
+        # but in order to maintain compatibility with historical data, this approach has been retained.
         "2": AgentNode,
         "1": AgentNode,
     },
diff --git a/api/core/workflow/nodes/tool/entities.py b/api/core/workflow/nodes/tool/entities.py
index 88c5160d1..f0a44d919 100644
--- a/api/core/workflow/nodes/tool/entities.py
+++ b/api/core/workflow/nodes/tool/entities.py
@@ -59,6 +59,10 @@ class ToolNodeData(BaseNodeData, ToolEntity):
             return typ
 
     tool_parameters: dict[str, ToolInput]
+    # The version of the tool parameter.
+    # If this value is None, it indicates this is a previous version
+    # and requires using the legacy parameter parsing rules.
+    tool_node_version: str | None = None
 
     @field_validator("tool_parameters", mode="before")
     @classmethod
diff --git a/api/core/workflow/nodes/tool/tool_node.py b/api/core/workflow/nodes/tool/tool_node.py
index c565ad15c..140fe71f6 100644
--- a/api/core/workflow/nodes/tool/tool_node.py
+++ b/api/core/workflow/nodes/tool/tool_node.py
@@ -70,7 +70,13 @@ class ToolNode(BaseNode):
         try:
             from core.tools.tool_manager import ToolManager
 
-            variable_pool = self.graph_runtime_state.variable_pool if self._node_data.version != "1" else None
+            # This is an issue that caused problems before.
+            # Logically, we shouldn't use the node_data.version field for judgment
+            # But for backward compatibility with historical data
+            # this version field judgment is still preserved here.
+            variable_pool: VariablePool | None = None
+            if node_data.version != "1" or node_data.tool_node_version != "1":
+                variable_pool = self.graph_runtime_state.variable_pool
             tool_runtime = ToolManager.get_workflow_tool_runtime(
                 self.tenant_id, self.app_id, self.node_id, self._node_data, self.invoke_from, variable_pool
             )
diff --git a/web/app/components/base/chat/chat/question.tsx b/web/app/components/base/chat/chat/question.tsx
index 666a869a3..6630d9bb9 100644
--- a/web/app/components/base/chat/chat/question.tsx
+++ b/web/app/components/base/chat/chat/question.tsx
@@ -117,7 +117,7 @@ const Question: FC<QuestionProps> = ({
         </div>
         <div
           ref={contentRef}
-          className='bg-background-gradient-bg-fill-chat-bubble-bg-3 w-full rounded-2xl px-4 py-3 text-sm text-text-primary'
+          className='w-full rounded-2xl bg-background-gradient-bg-fill-chat-bubble-bg-3 px-4 py-3 text-sm text-text-primary'
           style={theme?.chatBubbleColorStyle ? CssTransform(theme.chatBubbleColorStyle) : {}}
         >
           {
diff --git a/web/app/components/workflow/nodes/agent/default.ts b/web/app/components/workflow/nodes/agent/default.ts
index 4f68cfe87..51955dc6c 100644
--- a/web/app/components/workflow/nodes/agent/default.ts
+++ b/web/app/components/workflow/nodes/agent/default.ts
@@ -7,7 +7,7 @@ import { renderI18nObject } from '@/i18n'
 
 const nodeDefault: NodeDefault<AgentNodeType> = {
   defaultValue: {
-    version: '2',
+    tool_node_version: '2',
   },
   getAvailablePrevNodes(isChatMode) {
     return isChatMode
@@ -62,27 +62,29 @@ const nodeDefault: NodeDefault<AgentNodeType> = {
           const userSettings = toolValue.settings
           const reasoningConfig = toolValue.parameters
           const version = payload.version
+          const toolNodeVersion = payload.tool_node_version
+          const mergeVersion = version || toolNodeVersion
           schemas.forEach((schema: any) => {
             if (schema?.required) {
-              if (schema.form === 'form' && !version && !userSettings[schema.name]?.value) {
+              if (schema.form === 'form' && !mergeVersion && !userSettings[schema.name]?.value) {
                 return {
                   isValid: false,
                   errorMessage: t('workflow.errorMsg.toolParameterRequired', { field: renderI18nObject(param.label, language), param: renderI18nObject(schema.label, language) }),
                 }
               }
-              if (schema.form === 'form' && version && !userSettings[schema.name]?.value.value) {
+              if (schema.form === 'form' && mergeVersion && !userSettings[schema.name]?.value.value) {
                 return {
                   isValid: false,
                   errorMessage: t('workflow.errorMsg.toolParameterRequired', { field: renderI18nObject(param.label, language), param: renderI18nObject(schema.label, language) }),
                 }
               }
-              if (schema.form === 'llm' && !version && reasoningConfig[schema.name].auto === 0 && !reasoningConfig[schema.name]?.value) {
+              if (schema.form === 'llm' && !mergeVersion && reasoningConfig[schema.name].auto === 0 && !reasoningConfig[schema.name]?.value) {
                 return {
                   isValid: false,
                   errorMessage: t('workflow.errorMsg.toolParameterRequired', { field: renderI18nObject(param.label, language), param: renderI18nObject(schema.label, language) }),
                 }
               }
-              if (schema.form === 'llm' && version && reasoningConfig[schema.name].auto === 0 && !reasoningConfig[schema.name]?.value.value) {
+              if (schema.form === 'llm' && mergeVersion && reasoningConfig[schema.name].auto === 0 && !reasoningConfig[schema.name]?.value.value) {
                 return {
                   isValid: false,
                   errorMessage: t('workflow.errorMsg.toolParameterRequired', { field: renderI18nObject(param.label, language), param: renderI18nObject(schema.label, language) }),
diff --git a/web/app/components/workflow/nodes/agent/types.ts b/web/app/components/workflow/nodes/agent/types.ts
index 5a13a4a4f..f163b3572 100644
--- a/web/app/components/workflow/nodes/agent/types.ts
+++ b/web/app/components/workflow/nodes/agent/types.ts
@@ -12,6 +12,7 @@ export type AgentNodeType = CommonNodeType & {
   plugin_unique_identifier?: string
   memory?: Memory
   version?: string
+  tool_node_version?: string
 }
 
 export enum AgentFeature {
diff --git a/web/app/components/workflow/nodes/agent/use-config.ts b/web/app/components/workflow/nodes/agent/use-config.ts
index a8b80c034..dd9236f24 100644
--- a/web/app/components/workflow/nodes/agent/use-config.ts
+++ b/web/app/components/workflow/nodes/agent/use-config.ts
@@ -129,7 +129,7 @@ const useConfig = (id: string, payload: AgentNodeType) => {
   }
 
   const formattingLegacyData = () => {
-    if (inputs.version)
+    if (inputs.version || inputs.tool_node_version)
       return inputs
     const newData = produce(inputs, (draft) => {
       const schemas = currentStrategy?.parameters || []
@@ -140,7 +140,7 @@ const useConfig = (id: string, payload: AgentNodeType) => {
         if (targetSchema?.type === FormTypeEnum.multiToolSelector)
           draft.agent_parameters![key].value = draft.agent_parameters![key].value.map((tool: any) => formattingToolData(tool))
       })
-      draft.version = '2'
+      draft.tool_node_version = '2'
     })
     return newData
   }
diff --git a/web/app/components/workflow/nodes/tool/default.ts b/web/app/components/workflow/nodes/tool/default.ts
index 1fdb9eed2..1d4056be6 100644
--- a/web/app/components/workflow/nodes/tool/default.ts
+++ b/web/app/components/workflow/nodes/tool/default.ts
@@ -10,7 +10,7 @@ const nodeDefault: NodeDefault<ToolNodeType> = {
   defaultValue: {
     tool_parameters: {},
     tool_configurations: {},
-    version: '2',
+    tool_node_version: '2',
   },
   getAvailablePrevNodes(isChatMode: boolean) {
     const nodes = isChatMode
diff --git a/web/app/components/workflow/nodes/tool/types.ts b/web/app/components/workflow/nodes/tool/types.ts
index 4584645a1..6294b9b68 100644
--- a/web/app/components/workflow/nodes/tool/types.ts
+++ b/web/app/components/workflow/nodes/tool/types.ts
@@ -23,4 +23,5 @@ export type ToolNodeType = CommonNodeType & {
   output_schema: Record<string, any>
   paramSchemas?: Record<string, any>[]
   version?: string
+  tool_node_version?: string
 }
diff --git a/web/app/components/workflow/utils/workflow-init.ts b/web/app/components/workflow/utils/workflow-init.ts
index dc22d61ca..92233f8d0 100644
--- a/web/app/components/workflow/utils/workflow-init.ts
+++ b/web/app/components/workflow/utils/workflow-init.ts
@@ -286,8 +286,8 @@ export const initialNodes = (originNodes: Node[], originEdges: Edge[]) => {
       }
     }
 
-    if (node.data.type === BlockEnum.Tool && !(node as Node<ToolNodeType>).data.version) {
-      (node as Node<ToolNodeType>).data.version = '2'
+    if (node.data.type === BlockEnum.Tool && !(node as Node<ToolNodeType>).data.version && !(node as Node<ToolNodeType>).data.tool_node_version) {
+      (node as Node<ToolNodeType>).data.tool_node_version = '2'
 
       const toolConfigurations = (node as Node<ToolNodeType>).data.tool_configurations
       if (toolConfigurations && Object.keys(toolConfigurations).length > 0) {