diff --git a/src/genworld.cpp b/src/genworld.cpp
index db145a5153..b657273f95 100644
--- a/src/genworld.cpp
+++ b/src/genworld.cpp
@@ -307,7 +307,7 @@ void GenerateWorld(GenWorldMode mode, uint size_x, uint size_y, bool reset_setti
 		_settings_game.construction.map_height_limit = std::max(MAP_HEIGHT_LIMIT_AUTO_MINIMUM, std::min(MAX_MAP_HEIGHT_LIMIT, estimated_height + MAP_HEIGHT_LIMIT_AUTO_CEILING_ROOM));
 	}
 
-	if (_settings_game.game_creation.generation_seed == GENERATE_NEW_SEED) _settings_game.game_creation.generation_seed = _settings_newgame.game_creation.generation_seed = InteractiveRandom();
+	if (_settings_game.game_creation.generation_seed == GENERATE_NEW_SEED) _settings_game.game_creation.generation_seed = InteractiveRandom();
 
 	/* Load the right landscape stuff, and the NewGRFs! */
 	GfxLoadSprites();
diff --git a/src/openttd.cpp b/src/openttd.cpp
index c5375bba4b..3af31509e1 100644
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -430,7 +430,7 @@ struct AfterNewGRFScan : NewGRFScanCallback {
 		SetEffectVolume(_settings_client.music.effect_vol);
 
 		if (startyear != CalendarTime::INVALID_YEAR) IConsoleSetSetting("game_creation.starting_year", startyear.base());
-		if (generation_seed != GENERATE_NEW_SEED) _settings_newgame.game_creation.generation_seed = generation_seed;
+		_settings_newgame.game_creation.generation_seed = generation_seed;
 
 		if (!dedicated_host.empty()) {
 			_network_bind_list.clear();
diff --git a/src/settings.cpp b/src/settings.cpp
index 9327672762..18c4790818 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -159,8 +159,10 @@ enum IniFileVersion : uint32_t {
 	IFV_GAME_TYPE,                                         ///< 2  PR#9515  Convert server_advertise to server_game_type.
 	IFV_LINKGRAPH_SECONDS,                                 ///< 3  PR#10610 Store linkgraph update intervals in seconds instead of days.
 	IFV_NETWORK_PRIVATE_SETTINGS,                          ///< 4  PR#10762 Move no_http_content_downloads / use_relay_service to private settings.
+
 	IFV_AUTOSAVE_RENAME,                                   ///< 5  PR#11143 Renamed values of autosave to be in minutes.
 	IFV_RIGHT_CLICK_CLOSE,                                 ///< 6  PR#10204 Add alternative right click to close windows setting.
+	IFV_REMOVE_GENERATION_SEED,                            ///< 7  PR#11927 Remove "generation_seed" from configuration.
 
 	IFV_MAX_VERSION,       ///< Highest possible ini-file version.
 };
@@ -1483,6 +1485,13 @@ void SaveToConfig()
 		}
 	}
 
+	if (generic_version < IFV_REMOVE_GENERATION_SEED) {
+		IniGroup *game_creation = generic_ini.GetGroup("game_creation");
+		if (game_creation != nullptr) {
+			game_creation->RemoveItem("generation_seed");
+		}
+	}
+
 	/* These variables are migrated from generic ini to private ini now. */
 	if (generic_version < IFV_NETWORK_PRIVATE_SETTINGS) {
 		IniGroup *network = generic_ini.GetGroup("network");
diff --git a/src/table/settings/world_settings.ini b/src/table/settings/world_settings.ini
index 1301847f7b..68225dbc26 100644
--- a/src/table/settings/world_settings.ini
+++ b/src/table/settings/world_settings.ini
@@ -199,6 +199,7 @@ strval   = STR_VARIETY_NONE
 var      = game_creation.generation_seed
 type     = SLE_UINT32
 from     = SLV_30
+flags    = SF_NOT_IN_CONFIG
 def      = GENERATE_NEW_SEED
 min      = 0
 max      = UINT32_MAX