Air Battle error popup (AI attacker)

[butterw]

Reproduction Steps

1. Air Battle with attacker (Hard AI)
   Displays an error message box: must complete air_battle first.
   The error message box is not blocking and the result is correct.

Attach a Save Game

"World War II v5 1942 2nd" modified to add Air battle
WW2v5_1942aa_2nd.zip

ex: 1st turn RUS (Hard AI) attack GER (Hard AI or Human) in Ukraine, BRI Human player.

	<property name="Battles May Be Preceeded By Air Battles" value="true" editable="false">
		<boolean/>
	</property>
	<property name="Air Battle Rounds" value="1" editable="false">
		<number min="-1" max="100"/>
	</property>
etc.

Engine Version

Engine Version: v2.5 latest stable release (Win64)

[butterw]

The same error message occurs when a Human Player Attacker tries to do the land battle before the air battle in the same territory.

• The preferred solution, would be to ensure the AI always performs the land battle before the air battle. Is this possible ?
• Otherwise the fix could be to not display this error message if the attacker is AI.

[butterw]

Problem still occurs with latest pre-release:
20:22:05.862 [main] INFO o.t.game.client.HeadedGameRunner - Launching game, version: 2.6.184
20:22:58.425 [Thread-7] WARN g.s.triplea.ai.AbstractBuiltInAi - Must complete IBattle.BattleType.AIR_BATTLE(type=Air Battle) in Ukraine S.S.R. first
with Triplea Error popup: If this problem happens frequently and is something you cannot fix, please report it to TripleA