Error PRL140: The CCC at the <location> has extra instances that may conflict with the NGMUX sitting in this location. Please check the rules for NGMUX placement.

The NGMUX is placed in a CCC that already has some other CCC macro placed in the GLA / GLC position.

Action

Place the instances not connected to NGMUX and sitting in the GLA and GLC positions to some other CCC.