[12/14/2021 17:30:52] TASK - [Prepare: Check kernel compatibility with RHEL] ********************
WARNING - Booted kernel version '5.4.17' does not correspond to the version '3.10.0' available in RHEL 7
[12/14/2021 17:30:52] DEBUG - Calling command 'rpm -qf --qf %{{NAME}} /boot/vmlinuz-5.4.17-2136.300.7.el7uek.x86_64'
[12/14/2021 17:30:52] DEBUG - Booted kernel package name: error: incorrect format: unknown tag

[12/14/2021 17:30:52] DEBUG - Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/convert2rhel/main.py", line 89, in main
    checks.perform_pre_checks()
  File "/usr/lib/python2.7/site-packages/convert2rhel/checks.py", line 51, in perform_pre_checks
    check_rhel_compatible_kernel_is_used()
  File "/usr/lib/python2.7/site-packages/convert2rhel/checks.py", line 374, in check_rhel_compatible_kernel_is_used
    _bad_kernel_package_signature(system_info.booted_kernel),
  File "/usr/lib/python2.7/site-packages/convert2rhel/checks.py", line 425, in _bad_kernel_package_signature
    kernel_pkg_obj = get_installed_pkg_objects(kernel_pkg)[0]
IndexError: list index out of range

$ yum update && yum install kernel 
$ convert2rhel ...