Content migration from pulp2 to pulp3 fails with error Katello::Errors::Pulp3Error: Validation failed: resources missing in Red Hat Satellite 6.9

Issue

• Execution of satellite-maintain content prepare fails with any of the following errors even before starting the actual migration process.

  ForemanTasks::TaskError: Task df64d1b7-3279-4684-b3af-5dcc3d5402ea: 
  Katello::Errors::Pulp3Error: Validation failed: resources missing {'repositories_missing_distributors': ['1-EPEL-v1289_0-RE-EPEL-EPEL-7-x86_64']}
  /opt/theforeman/tfm/root/usr/share/gems/gems/katello-3.18.1.46/lib/katello/tasks/pulp3_migration.rake:43:in `block (2 levels) in <top (required)>'
  

   

  ForemanTasks::TaskError: Task cde6274a-38ec-4adf-9ee2-9eba814714b0: Katello::Errors::Pulp3Error: 
  Validation failed: resources missing {'repositories': ['9039817e-7178-4654-af63-10086ffa83b3', '466279f4-d9fe-4250-b201-d35afe75c412', '6eda3c7b-e689-45c9-954a-b5eb0ff3e4b2', '561dc2e0-bc20-43ed-a5aa-0a8b80121cb4', 'dfe4d41e-af04-4c31-b061-195acd6dc6bf', '259bb346-ca50-431d-b723-abf198f452a5'], 
  'repositories_missing_importers': ['9039817e-7178-4654-af63-10086ffa83b3', '466279f4-d9fe-4250-b201-d35afe75c412', '6eda3c7b-e689-45c9-954a-b5eb0ff3e4b2', '561dc2e0-bc20-43ed-a5aa-0a8b80121cb4', 'dfe4d41e-af04-4c31-b061-195acd6dc6bf', '259bb346-ca50-431d-b723-abf198f452a5'], 
  repositories_missing_distributors': ['9039817e-7178-4654-af63-10086ffa83b3', '466279f4-d9fe-4250-b201-d35afe75c412', '6eda3c7b-e689-45c9-954a-b5eb0ff3e4b2', '561dc2e0-bc20-43ed-a5aa-0a8b80121cb4', 'dfe4d41e-af04-4c31-b061-195acd6dc6bf', '259bb346-ca50-431d-b723-abf198f452a5']}
  /opt/theforeman/tfm/root/usr/share/gems/gems/katello-3.18.1.46/lib/katello/tasks/pulp3_migration.rake:43:in `block (2 levels) in <top (required)>'