Error when typing library(tidyverse)

I have R Version 3.6.2 and RStudio Version 1.2.5019

I type install.packages("tidyverse"), the package is installed wihout problem
But when I type library(tidyverse), I obtain the following error message :

Error: package or namespace load failed for ‘tidyverse’ in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]):
le package ‘rlang’ 0.4.0 est déjà chargé, mais >= 0.4.1 est requis

I type install.packages("rlang") without problem. But when I type library(tidyverse), I obtain the same error message.

MY QUESTION 1: Why install.packages(rlang) does not install the most recent version of rlang ?

MY QUESTION 2: How to install "rlang 0.4.1" when "rlang 0.4.0" is already loaded" ?

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