diff --git a/api/core/tools/entities/tool_entities.py b/api/core/tools/entities/tool_entities.py
index 02f66c545d..b8eae600d1 100644
--- a/api/core/tools/entities/tool_entities.py
+++ b/api/core/tools/entities/tool_entities.py
@@ -125,7 +125,7 @@ class ToolInvokeMessage(BaseModel):
 
     class VariableMessage(BaseModel):
         variable_name: str = Field(..., description="The name of the variable")
-        variable_value: str = Field(..., description="The value of the variable")
+        variable_value: Any = Field(..., description="The value of the variable")
         stream: bool = Field(default=False, description="Whether the variable is streamed")
 
         @model_validator(mode="before")
diff --git a/web/app/components/workflow/run/utils/format-log/iteration/index.ts b/web/app/components/workflow/run/utils/format-log/iteration/index.ts
index ca3dad7fb0..d51c2315e3 100644
--- a/web/app/components/workflow/run/utils/format-log/iteration/index.ts
+++ b/web/app/components/workflow/run/utils/format-log/iteration/index.ts
@@ -3,10 +3,10 @@ import type { NodeTracing } from '@/types/workflow'
 import formatParallelNode from '../parallel'
 function addChildrenToIterationNode(iterationNode: NodeTracing, childrenNodes: NodeTracing[]): NodeTracing {
   const details: NodeTracing[][] = []
-  childrenNodes.forEach((item) => {
+  childrenNodes.forEach((item, index) => {
     if (!item.execution_metadata) return
-    const { parallel_mode_run_id, iteration_index = 0 } = item.execution_metadata
-    const runIndex: number = (parallel_mode_run_id || iteration_index) as number
+    const { iteration_index = 0 } = item.execution_metadata
+    const runIndex: number = iteration_index || index
     if (!details[runIndex])
       details[runIndex] = []