ID:18981 The same partition name "<block>" is used for partition assignments on instances <partition1> and <partition2>. Multiple partitions cannot have the same name."

CAUSE: You cannot use the same partition name for more than one partition assignment in the project.

ACTION: Remove the duplicate assignments or correct the assignments to ensure that each partition has a different name. Use the Design Partitions Window or edit the following assignments in the Quartus Settings File (.qsf): set_instance_assignment -name PARTITION PARTITION_NAME -to HIERARCHICAL_INSTANCE