从cloudformation运行yaml时出错

运行以下代码时出错:

Parameters:
  Counter:
    Type : Number
    Default : 5
    Description : Maximum number of times to check query execution

错误:

An error occurred (ValidationError) when calling the CreateChangeSet operation: Invalid input for parameter key Counter. Cannot specify usePreviousValue as true for a parameter key not in the previous template

我用yaml编写代码并通过aws cloudformation运行。