can't say that -1 is an expected value. For child associations, they should be 0 and upwards, ordering children within the same association type. On the other hand, as long as you don't find problems with the behaviour of the system, I would not try to fix this (as this would only be possible via database manipulation and require considerable effort to get consistently right).
Thank you for reply. I have a situation: I created a group, these groups I have added users. I have given rights to different groups to different areas of the repository. No major changes to the settings did not make. But now, all users except members of ALFRESCO_ADMINISTRATORS do not see any of the repository. Also, users can not add a dashlet, and change your password. What happened I do not know. I would be grateful for your help. Thank you.