Fiscal year variant K1 is not defined fro calendar year 2001

The error message, "Fiscal year variant K1 is not defined for calendar year 2001", appeared when creating an asset class (t-code AS01). Does anyone know where the strange "2001" came from?

Additional information:

- I'm in the process of configuring Asset Accounting...in year 2020.

- AA uses the same fiscal year variant (K1) as FI.

- Chart of Depre is a copy of the US reference one.

- S/4HANA 1809