After re-publishing, the service is now unshared from the group. After re-sharing, only the remaining layer(s) are exposed in Open Data.
対処法
Currently, the only way to remove the Rec_Sites service from the Open Data site is to remove the service from the Open Data group, then re-add the service to the group. Use the 'Update Index' or 'Refresh' options in the Data Manager tab. Do not remove the deleted service.