I'm failing to install the current Kernel:

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Checking for file conflicts:
.........................................................................................................................................................................[done]
        installing package kernel-default-5.3.18-150300.59.98.1.x86_64 needs
2MB on the /boot filesystem
( 1/56) Installing: kernel-default-5.3.18-150300.59.98.1.x86_64
.....................................................................................................................................[error]
Installation of kernel-default-5.3.18-150300.59.98.1.x86_64 failed:
Error: Subprocess failed. Error: RPM failed: Command exited with status 1.
Abort, retry, ignore? [a/r/i] (a): a
Warning: %posttrans scripts skipped while aborting:
    kernel-default-5.3.18-150300.59.98.1.x86_64.rpm

Problem occurred during or after installation or removal of packages:
Installation has been aborted as directed.
Please see the above error message for a hint.

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My /boot has much more space available than the needed 2MB:

naumann:/home/ich # df -h /boot/
Filesystem      Size  Used Avail Use% Mounted on
/dev/md126      246M  113M  121M  49% /boot