rename buffer but overwrite already existing one

[Uwe Brauer]

Hi 

Not sure my first posting arrived, if yes my apologies.
I use rename-buffer quite often, especially for message buffers.
However once a name is taken, the function refuses to overwrite a
buffer. I could of course use rename-uniquely in which case a number is
attached, but this I find quickly confusing.

Couldn't rename-buffer, optionally, overwrite the content of a buffer.

I looked around but can't find such a functionality.

Thanks and regards

Uwe Brauer