Those are the functions @Sergius is referring to, and which had been changed to Ctrl+Shift+Enter and Ctrl+Shift+Del with v3.37-beta.1
CHG: changed shortcuts to add and remove history entries to Shift+Ctrl+Return and Shift+Ctrl+Del. (#60573)
Based on the discussion in this topic I became aware of
which I did not realize initially when changing the shortcut.
I agree with @MotleyG that
It is not likely a good idea to have the same shortcut for two different operations. Especially one that includes a delete function.
I'm now contemplating to remove the shortcut to delete a custom field value with the next version to resolve this ambiguity. It's already possible to remove values via Options → Field Values, and contrary to adding custom field values, it's probably not the most used feature in this context.