I am getting this error when enabling a new custom module on Drupal 9.5.10. T...

I am getting this error when enabling a new custom module on Drupal 9.5.10. The site is an old Drupal 8 site that has been upgraded to Drupal 9 a year back & it's a minimal Drupal profile. The steps that I performed were:

• Created a new custom module directory & the info yml file.
• Added custom migration yml in config/install directory. (Note: I don't have any other config files in config/install.)
• In CLI, I did drush en - y custom_module_name and got the notice & warning saying No configuration objects have been updated..
• Despite the notice & warning, The module gets enabled.

Even after applying the patches, The issue remains.