syncBoundGroupsForTenant()'s rename write updates name and ldapDn in one
call, so a P2002 there can come from either @@unique([tenantId, name])
or @@unique([tenantId, ldapDn]). The catch previously reported every
P2002 as a name collision unconditionally; it now inspects
err.meta.target the same way importGroupsByDn() already does for its
own create() call, so a non-name unique violation is no longer
mislabelled and sent the admin down the wrong troubleshooting path.
schalli
19717954d6