More informative error message on attempt to delete default branch

[DGoettlich]

Hi!

I tried to delete (change) the main branch which I now understand is not possible. But perhaps the error message could reflect that:

Command:

lakectl branch delete lakefs:///main -y

Current error message:

http:///api/v1/repositories//branches/main giving up after 5 attempt(s)
Error executing command.

Possible alternative:

Error executing command: you are trying to delete the default branch, which is not supported.

All the best!