You usually get this message when you start on a map, but in no way beginning any activities there.
After an hour you will be deactivated then to free the place. But you can sign on to the map again.
If you've already been active on the map, then it may be a bug and you should contact the support directly:
[spoiler=support at the map]
[/spoiler][spoiler=support via homepage]
[/spoiler]
