We used to have a `neutron` user in LDAP which got eventually deleted to don't clash with the `neutron` system user created by openstack packages.
It seems we need further cleanup, I think we have some role assigned to this (now missing) `neutron` LDAP user which makes this command crash:
```lang=shell-session
root@cloudcontrol1003:~# openstack role assignment list --names
Could not find user: neutron (HTTP 404) (Request-ID: req-2a42ad3e-7341-4473-8b5c-1c01d5e78a4d)
```
Apparently is this entry:
```lang=shell-session
root@cloudcontrol1003:~# openstack role assignment list
+----------------------------------+------------------------------------------+-------+----------------------------------+--------+-----------+
| Role | User | Group | Project | Domain | Inherited |
+----------------------------------+------------------------------------------+-------+----------------------------------+--------+-----------+
[..]
| f473273fac7146b3bdbf22e5d4504f95 | neutron | | bastion | | False |
```
If trying to remove the role assignment by hand, an error happens:
```lang=shell-session
root@cloudcontrol1003:~# openstack role remove --user neutron --project bastion f473273fac7146b3bdbf22e5d4504f95
No user with a name or ID of 'neutron' exists.
```
So perhaps this needs cleanup at database level.