diff --git a/web/app/components/workflow/nodes/tool/components/input-var-list.tsx b/web/app/components/workflow/nodes/tool/components/input-var-list.tsx
index 9d9940b8e..e47082f4b 100644
--- a/web/app/components/workflow/nodes/tool/components/input-var-list.tsx
+++ b/web/app/components/workflow/nodes/tool/components/input-var-list.tsx
@@ -72,7 +72,7 @@ const InputVarList: FC<Props> = ({
         }
         else {
           draft[variable] = {
-            type: varKindType,
+            type: VarKindType.variable,
             value: varValue,
           }
         }
@@ -171,7 +171,7 @@ const InputVarList: FC<Props> = ({
                   value={varInput?.type === VarKindType.constant ? (varInput?.value || '') : (varInput?.value || [])}
                   onChange={handleNotMixedTypeChange(variable)}
                   onOpen={handleOpen(index)}
-                  defaultVarKindType={varInput?.type}
+                  defaultVarKindType={VarKindType.variable}
                   filterVar={isNumber ? filterVar : undefined}
                   availableVars={isSelect ? availableVars : undefined}
                   schema={schema}