Yes, you just link those existing devices to the new user.
Thanks Anton for help. it's a bit different in different versions of traccar, but i understand its:
newer then 5.3 - Settings/Users/{editing a given user}/Connections tab/Devices dropdown - and here one clicks on all devices one wants to link to that user - or I can also just link a whole group.
New Traccar
old traccar - Users/{select user}/click on Devices button/{checkbox required devices}
Old Traccar
Hi,
I tried to create a new user and re-add devices that were already added before to a different user. I got an error - is it possible to have same devices visible under different users?