Yes repos are compatible, there's not much to worry about.

https://borgbackup.readthedocs.io/en/1.4-maint/changes.html#borg-1-2-x-to-1-4-x

-- 
  Sent from a phone, apologies for poor formatting.
On 4 July 2024 06:44:56 Matthieu Herrb <matthieu@openbsd.org> wrote:

> On Wed, Jul 03, 2024 at 11:14:26PM -0600, Bjorn Ketelaars wrote:
>> CVSROOT: /cvs
>> Module name: ports
>> Changes by: bket@cvs.openbsd.org 2024/07/03 23:14:26
>>
>> Modified files:
>> sysutils/borgbackup: Makefile
>>
>> Log message:
>> sysutils/borgbackup - hook up 1.4/ and unhook 1.2/
>
> Hi,
>
> Is 1.4 compatible with 1.2 repositories or is there some constraint to
> upgrade the server and clients simultaneously ?
>
>
> --
> Matthieu Herrb