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Description of problem:
In 6.15 we've removed LCE field from Register Host page in WebUI, and added validation when user tries to register with any LCE other than selected CV, for example, non-library LCE with Default Org CV, which won't work.

Version-Release number of selected component (if applicable):
Satellite 6.15.0 Snap 1.0

How reproducible:
Always

Steps to Reproduce:
1. # hammer host-registration generate-command --help | grep lifecycle
 --lifecycle-environment[-id] VALUE/NUMBER Lifecycle environment for the host.

Actual results:
LCE option is still present in Hammer/API, and user will get validation errors when registered with command generated above

Expected results:
LCE option not present in Hammer/API

Additional info:
RE: https://github.com/Katello/katello/pull/10764#issuecomment-1846090408

Verified.

Tested on Satellite 6.15.0 Snap 7.0

Steps:
1. # hammer host-registration generate-command --help
2. Check apidocs for "POST /api/registration_commands" 

Observation:
LCE option --lifecycle-environment[-id] not present in Hammer and "registration_command[lifecycle_environment_id]" parameter not present in API

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Important: Satellite 6.15.0 release), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2024:2010