FPL Waypoint Is Locked

[LEP 1]

I had reverted the database to point to the older version so that I may load smaller airports, as per instruction found in this forum. It all works fine, but whenever the GNS is first loaded (example at AYPY in PNG, or whichever other PNG airports), there would always a MSG from the GNS that says "FPL Waypoint is locked". Why is that, and does it affect anything?

Edit - This only happens in the 430. The 530 loads up fine with no such message.

Edited December 9, 2021 by LEP

[DavidP 1,421]

Your flight plan contains an invalid waypoint

[LEP 1]

I can confirm the mentioned waypoints are all valid ones, such as AYPY, a big airport in PNG. Read somewhere that waypoints with same names can trigger that, but AYPY is definitely unique.