Asset land only asset type code Z vs X

Previously I created an asset for bare land and used the asset type code Z where I would enter all of the depreciation information. This year the error check in Turbo Tax Business 2018 is saying if this asset is entirely composed of land (it is) and I want to keep this asset entry worksheet for tracking purposes ( I do) that because the land value is the total basis that I should change the asset type code to X. However X is not a choice in the drop down. Thus I cannot correct the error and cannot file. Help!