An X on NCPs in PGE

[Superfrancybros]

Hey! In some episodies with the PGE i see an X on A NPC.

what it means and how do you put it?

[Enjl]

Objects with the X icon use a deprecated NPC ID, of which there is an alternative in the tileset itembox. The X serves as a marker for "don't use this", while allowing old episode to continue working as intended.