[Solved] Two users share the same uid

[petersen]

Hello,

We have a problem with importing some users or the behavior.

An LDAP server serves as the basis for our user administration. With the appropriate group, the users intended for VPN access can be imported from the LDAP into the firewall.

For colleagues from the helpdesk, we have a group that can access restricted functions of the firewall.

Since the last 2 imported users, however, we have noticed a strange phenomenon. These users were automatically in the helpdesk group.
If we remove user X from the helpdesk group, user A, who is in the group as intended, is also automatically removed.
It looks as if the newly imported user X is linked to user A from the helpdesk group.
If we add user A to the Helpdesk group, user X is automatically in the group again.

This has already been the case with two different users.

What could be the reason for this? Where can I look to find out how these users are linked to each other?
Other users have not yet been affected by this. It only affects new users and those who are assigned to the Helpdesk group.

I hope this is the right section of the forum for this question.


Edit: After some research we found out that the uid starts again at 2002 instead of 2249 where it should be.
For this reason, there are two users with the same uid.

How can this happen and how can we fix it?

The users A and X have different uid's in our LDAP.

Added two screenshots.
Changed the topic title to a more fitting title.

[petersen]

Hi,

We have solved our problem.
https://forum.opnsense.org/index.php?topic=27124.msg131583#msg131583 has provided us with the solution.

We switched from a firewall setup to a high availability setup earlier this year and imported some settings like the users. I know this is not recommended.
After this import, the value of <nextuid> was 2000. And because we imported our user settings, we already had a user with uid 2000.