Error!! CRS object has comment, which is lost in output; in tests

[yadavmahesh22]

Hi!

I am referring to this file ATLAS/notebooks/reference-regions_R.ipynb

I met a problem when executing the command proj4string(refregions), and the warning message is as follows:

Warning message:
In proj4string(refregions) :
  CRS object has comment, which is lost in output; in tests, see
https://cran.r-project.org/web/packages/sp/vignettes/CRS_warnings.html

I am using Rstudio (R version 4.1.2) to do all the things, and everything ran perfectly with previous commands.

Can you let me know what's the problem?

Many thanks in advance.