When opening a new period, why is the target date showing a different month than the cost period?

Summary:

I am opening a client's cost period from the "Manage Cost Accounting Periods" screen. As an example, I highlight the row to open the October 2023 period, but when I click the "Open Target Period" button, the accounting period is listed as 07-2023. What is the cause of the periods being misaligned, and how can I resolve it?

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