the error "Export Data Store Entity to Excel Smart Service"

I am having trouble with the error "Export Data Store Entity to Excel Smart Service".

I am using "Copy Document Service" and "Export Data Store Entity to Excel Smart Service" in the process model.

The contents I want to process are as follows.

① Copy an Excel document.

② Paste the content exported from the Data Store Entity into the copied document.

To achieve these goals, we first stored the document output by "Copy Document Service" as "pv!copyExcelTemplate".
Thanks to this, ① was achieved.

Next, I set "pv!copyExcelTemplate" to "Document to Update".

This results in an error that says, "Please select a new document name, or if you want to access an existing document, select the document you want to update."
(it's Japanese)

The document should be configured correctly, so why am I getting this error?

Note that if I leave "Document to Update" blank, I can export the contents of the Data Store Entity without any problems.