SAP Message WRF_PRC_POHF199 - Control table for grouping is currently being edited

Diagnosis
A data conflict has occurred
The control table for the grouping is currently blocked by another user.

System Response
The system attempts to synchronize the control table for the groupingusing your current settings for the OTB bucket as grouping criteria.

Procedure
Ensure that the control table for the grouping is no longer locked.