You may have created a planet earlier before updating to 1.8.0 ?
Deleting a planet after viewing does not clear its processing status for Rampant (and this is intended, since, for example, in some cases mods can specify whether or not to process a planet before creating it)
You can allow it to be processed:
1.8.0:
Other:
- Added menu for admin players. They can make it visible through player settings.
Allows you to replace enemies with standard ones, as well as specify which surfaces/planets to ignore by AI
Also, added a command for administrators "/rampantSetSurfaces". Allows you to open the surface processing interface directly
Warning: allowing large planets to be processed can lead to long (up to half an hour) lags
Bugfixes:
- Fixed surfaces with biters being ignored if they were created after surfaces without biters (new game only)