Invalid map extra id "mx_pond_swamp_2"

[PatrikLundell]

Describe the bug

DEBUG : invalid map extra id "mx_pond_swamp_2"

REPORTING FUNCTION : obj
C++ SOURCE FILE : C:\Cataclysm-DDA\src\generic_factory.h
LINE : 489
VERSION : cdda-experimental-2024-11-13-1444-4279-g068fcf853b

sometimes appear when I bring up the overmap. I think there's also one for another version, possibly without the _2 suffix.

Attach save file

Wimbledon-trimmed.tar.gz

Steps to reproduce

1. Load the save.
2. Open the overmap.

Expected behavior

No error spam.

Screenshots

No response

Versions and configuration

• OS: Windows
  • OS Version: 10.0.19045.5737 (22H2)
• Game Version: cdda-experimental-2024-11-13-1444-4279-g068fcf853b [64-bit]
• Graphics Version: Tiles
• Game Language: System language []
• Mods loaded: [
  Dark Days Ahead [dda],
  Disable NPC Needs [no_npc_food],
  Portal Storms Ignore NPCs [personal_portal_storms],
  Slowdown Fungal Growth [no_fungal_growth]
  ]

Additional context

I guess it's a matter of the presence of an overmap mx that has been obsolesced since the terrain in the save was generated, and so should be on some kind of blacklist (similar to how various bones should be on a temperature one).

[harakka]

This is from #78419, I moved the map extra to a mod and didn't remember to obsolete it in vanilla.