Game State Read Error ("Unsupported room oxygen: -1")

[neube3]

Disclaimer: I have a few light mods (i.e. graphics and events, no overhauls of any sort) installed, but I don't think they're the source of the problem.

Lanius B ship, trying for the low oxygen achievement. I try to keep only two (sometimes three for a few seconds) oxygenated rooms on the ship. There are Two Lanius crewmembers as well.

Error message below.

[code]
Game State Read Error

Exception: java.io.IOException: Unsupported room oxygen: -1

Stack Trace...
  net.blerf.ftl.parser.SavedGameParser.readRoom(SavedGameParser.java:1130)
  net.blerf.ftl.parser.SavedGameParser.readShip(SavedGameParser.java:625)
  net.blerf.ftl.parser.SavedGameParser.readSavedGame(SavedGameParser.java:135)
  net.blerf.ftl.ui.FTLFrame.actionPerformed(FTLFrame.java:893)
  javax.swing.AbstractButton.fireActionPerformed(Unknown Source)

Editor Version: 27
OS: Windows 8.1 6.3
VM: Java HotSpot(TM) 64-Bit Server VM, 1.8.0_73, amd64
[/code]

File ("continue.sav")...
[code]
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[/code]

[Qwerty-Space]

Same here.