MAC PDDCH check and update overlap cce others ss

Hello Experts,
What does this overlapping indicate.
Throughput if it is 1 UE only in NSA. I guess it should.

mac_pdcch_check_and_update_overlap_cce_others_ss

It means that a dedicated PDCCH overlaps with some common search space.
This should not happen.

Dedicated & Common PDCCH should be in different search space id?