drupal/calendar 1.0.0-alpha2 -> no matching package found

I follow the procedure described here while upgrading from 2.11.0 to 2.13.0 ---> https://opigno.atlassian.net/wiki/spaces/OUM20/pages/363134999/Upgrade+w...

the composer.json I use is exactly the same of this (downloaded, extracted and copied it) --> https://opigno.atlassian.net/wiki/download/attachments/363134999/compose...

name     : opigno/opigno_lms
descrip. : Opigno LMS profile
keywords : 
versions : * 2.11.0
latest   : 2.13.0
type     : drupal-profile
license  : GNU General Public License v2.0 or later (GPL-2.0-or-later) (OSI approved) https://spdx.org/licenses/GPL-2.0-or-later.html#licenseText
homepage : https://bitbucket.org/opigno/opigno_lms
source   : [git] https://bitbucket.org/opigno/opigno_lms.git 64668d815de9c9bc17b7eb663ff665c95704970d
dist     : [zip] https://bitbucket.org/opigno/opigno_lms/get/64668d815de9c9bc17b7eb663ff665c95704970d.zip 64668d815de9c9bc17b7eb663ff665c95704970d
path     : /app/drupal/web/profiles/contrib/opigno_lms
names    : opigno/opigno_lms

when I run the "composer update --dry-run" command I get the following error.

  [Composer\DependencyResolver\SolverProblemsException]                                                   
  Problem 1                                                                                               
      - Installation request for opigno/opigno_lms 2.13.0 -> satisfiable by opigno/opigno_lms[2.13.0].    
      - opigno/opigno_lms 2.13.0 requires drupal/calendar 1.0.0-alpha2 -> no matching package found.      
                                                                                                          
  Potential causes:                                                                                       
   - A typo in the package name                                                                           
   - The package is not available in a stable-enough version according to your minimum-stability setting  
     see <https://getcomposer.org/doc/04-schema.md#minimum-stability> for more details.                   
   - It's a private package and you forgot to add a custom repository to find it                          
                                                                                                          
  Read <https://getcomposer.org/doc/articles/troubleshooting.md> for further common problems. 

the screenshot of the error is below: