diff --git a/changelog.md b/changelog.md
index f9e5dbfa..6bb31469 100644
--- a/changelog.md
+++ b/changelog.md
@@ -13,6 +13,7 @@
 
 ## Fixes
 * **[New Game Wizard]** Settings would not persist when going back to a previous page.
+* **[Mission Generation]** Unused aircraft are no longer claimed, fixing a bug where these aircraft would no longer be available after aborting the mission.
 
 
 # Retribution v1.1.1  (hotfix)
diff --git a/game/ato/flight.py b/game/ato/flight.py
index 44042788..956d4cae 100644
--- a/game/ato/flight.py
+++ b/game/ato/flight.py
@@ -56,13 +56,15 @@ class Flight(SidcDescribable, RadioFrequencyContainer, TacanContainer):
         frequency: Optional[RadioFrequency] = None,
         channel: Optional[TacanChannel] = None,
         callsign: Optional[str] = None,
+        claim_inv: bool = True,
     ) -> None:
         self.id = uuid.uuid4()
         self.package = package
         self.country = country
         self.coalition = squadron.coalition
         self.squadron = squadron
-        self.squadron.claim_inventory(count)
+        if claim_inv:
+            self.squadron.claim_inventory(count)
         if roster is None:
             self.roster = FlightRoster(self.squadron, initial_size=count)
         else:
diff --git a/game/migrator.py b/game/migrator.py
index c58eca94..5f20ed0f 100644
--- a/game/migrator.py
+++ b/game/migrator.py
@@ -25,6 +25,7 @@ class Migrator:
         self._update_package_attributes()
         self._update_control_points()
         self._update_flights()
+        self._release_untasked_flights()
 
     def _update_doctrine(self) -> None:
         doctrines = [
@@ -77,3 +78,13 @@ class Migrator:
             try_set_attr(f, "tacan")
             try_set_attr(f, "tcn_name")
             try_set_attr(f, "fuel", f.unit_type.max_fuel)
+
+    def _release_untasked_flights(self) -> None:
+        for cp in self.game.theater.controlpoints:
+            for s in cp.squadrons:
+                claimed = s.owned_aircraft - s.untasked_aircraft
+                count = 0
+                for f in s.flight_db.objects.values():
+                    if f.squadron == s:
+                        count += f.count
+                s.claim_inventory(count - claimed)
diff --git a/game/missiongenerator/aircraft/aircraftgenerator.py b/game/missiongenerator/aircraft/aircraftgenerator.py
index 9cccbd7f..93fd8f7f 100644
--- a/game/missiongenerator/aircraft/aircraftgenerator.py
+++ b/game/missiongenerator/aircraft/aircraftgenerator.py
@@ -180,6 +180,7 @@ class AircraftGenerator:
                 FlightType.BARCAP,
                 StartType.COLD,
                 divert=None,
+                claim_inv=False,
             )
             flight.state = Completed(flight, self.game.settings)
 
diff --git a/qt_ui/windows/QWaitingForMissionResultWindow.py b/qt_ui/windows/QWaitingForMissionResultWindow.py
index 628c6ac7..0397dc29 100644
--- a/qt_ui/windows/QWaitingForMissionResultWindow.py
+++ b/qt_ui/windows/QWaitingForMissionResultWindow.py
@@ -1,7 +1,6 @@
 from __future__ import annotations
 
 import logging
-import os
 from pathlib import Path
 from typing import Optional
 
@@ -23,7 +22,6 @@ from jinja2 import Environment, FileSystemLoader, select_autoescape
 
 from game import Game
 from game.debriefing import Debriefing
-from game.persistency import base_path
 from game.profiling import logged_duration
 from qt_ui.simcontroller import SimController
 from qt_ui.windows.GameUpdateSignal import GameUpdateSignal