ID:138015 Top-level entity is already defined as a partition. The top-level partition is a default partition that always exists in the project.

CAUSE: You attempted to define a partition for an entity instance that is already set as a partition. If the warning message appears after you manually edit the Quartus Prime Settings File (.qsf) for the project, only one of the partitions defined for this entity instance is recognized by the Quartus Prime software.

ACTION: If you obtain this warning message while trying to create a partition using the Design Partitions Window command, no action is required because your request is ignored. If you obtain this warning message after manually editing the Quartus Prime Settings File, make the correction in the Quartus Prime Settings File to avoid seeing this warning message again.