The elements of Primary Asset Types to Scan disappear by themselves.

Hello.
If I create multiple elements with the same Primary Asset Type in “Project Settings/Game/Asset Manager/Primary Asset Types to Scan” and reopen the Unreal Editor, only the one with the lowest “Rules/Priority” value (higher priority) remains.
Only the one with the lower “Rules/Priority” value (the one with the higher priority) remains, and the other elements with the same Primary Asset Type disappear by themselves.
What should I do?
(I am Japanese, so please forgive me if some of the expressions are unnatural.)