Bug: I had a rail blueprint book in my player inventory. I set it to my hotbar. With the BP book in my cursor, I selected the blueprint in it, and pressed the key to change all rail entities in it to the bridge-variant. It instantly crashed and said "It's not a blueprint." When I reload my save, the blueprint book is entirely gone/deleted.

Error Message:

The mod Beautiful Bridge Railway for Cargoships (1.3.5) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event beautiful_bridge_railway_Cargoships::kap-bbr-cycle-key (ID 223)
Item is not blueprint.
stack traceback:
[C]: in function 'is_blueprint_setup'
beautiful_bridge_railway_Cargoships/control.lua:161: in function <beautiful_bridge_railway_Cargoships/control.lua:157>