I can't change the date on the currency settings of a Project Plan when I edit a project template

Summary:

I am unable to change a fixed date of a rate in the currency settings tab within the Project Plan inside the setup of an existing Template. Each time I modify the date and either save or save and close, the same outcome occurs: when I return to the settings, the date reverts to the previously registered one. This prevents me from making the change in the Template and only allows direct updates within the created Project. Is this a common issue, or is this the expected behavior?

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