those altnames are simply alternative names given to the interfaces by the kernel. This is a result of how hardware enumeration works.
See also this guide on how to manage such aliases.
You can e.g. delete them ip l prop del dev eno4 altname <altname>ICODE], but it's rather pointless, as altnames have no impact on normal operation.
Assuming then that this answered your question sufficiently!
Please just mark the thread as solved by editing the first post - there should be a dropdown near the title field. This helps other people with the same question to more easily find this thread in the future!
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