Why content-manager not generating at extensions folder

hello, what do you think is going on when strapi won’t detect the newly created content-manager plugin folder?

but when i change the folder name from ‘/plugins/content-manager’ to something else like “/plugins/content-managers

this happened
[2023-04-14 11:29:54.148] debug: :no_entry: Server wasn’t able to start properly.
[2023-04-14 11:29:54.149] error: Duplicated item key: plugin::content-manager.explorer.create