Rudder

When adding a node, the following error occurs:
"""
Error when trying to accept node fca7ec51-f65f-4441-810f-a04137b67448 <- Error when executing accept node process named accept_new_server:add_system_configuration_rules <- Technical group with ID 'NodeGroupId(hasPolicyServer-ddd20cd5-4e96-4d44-b699-cd93a7347309)' was not found <- Error when retrieving the entry for NodeGroup 'NodeGroupId(hasPolicyServer-ddd20cd5-4e96-4d44-b699-cd93a7347309)'
"""

Compliance on server is set in the past (date the bug occurs?)

http://rudder/uuid => ddd20cd5-4e96-4d44-b699-cd93a7347309
(instead of root)

Workaround: (thanks to jooooooon)
echo root > /opt/rudder/etc/uuid.hive

The steps to reach this state are still unknown
Rudder 2.8.1
Red Hat Enterprise Linux Server release 6.3 (Santiago)