From 632caff2f3c286ec76c45adcf5f54d6bf7fc7684 Mon Sep 17 00:00:00 2001
From: Xavion3 <xavion333@gmail.com>
Date: Thu, 6 Mar 2025 08:58:51 +1100
Subject: [PATCH] [Bug][Hotfix] Fix migration crash (#5482)

---
 package-lock.json                               | 4 ++--
 package.json                                    | 2 +-
 src/system/version_migration/versions/v1_7_0.ts | 6 +++++-
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index 453a525581b..b1c7564a2ee 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
 	"name": "pokemon-rogue-battle",
-	"version": "1.7.6",
+	"version": "1.7.7",
 	"lockfileVersion": 3,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "pokemon-rogue-battle",
-			"version": "1.7.6",
+			"version": "1.7.7",
 			"hasInstallScript": true,
 			"dependencies": {
 				"@material/material-color-utilities": "^0.2.7",
diff --git a/package.json b/package.json
index 4c9204f60f9..4175ce899e6 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
 	"name": "pokemon-rogue-battle",
 	"private": true,
-	"version": "1.7.6",
+	"version": "1.7.7",
 	"type": "module",
 	"scripts": {
 		"start": "vite",
diff --git a/src/system/version_migration/versions/v1_7_0.ts b/src/system/version_migration/versions/v1_7_0.ts
index bdb9e6aab9f..3dcff3af241 100644
--- a/src/system/version_migration/versions/v1_7_0.ts
+++ b/src/system/version_migration/versions/v1_7_0.ts
@@ -13,7 +13,11 @@ export const systemMigrators = [
     if (data.starterData && data.dexData) {
       Object.keys(data.starterData).forEach(sd => {
         const caughtAttr = data.dexData[sd]?.caughtAttr;
-        const species = getPokemonSpecies(Number(sd));
+        const speciesNumber = Number(sd);
+        if (!speciesNumber) { // An unknown bug at some point in time caused some accounts to have starter data for pokedex number 0 which crashes
+          return;
+        }
+        const species = getPokemonSpecies(speciesNumber);
         if (caughtAttr && species.forms?.length > 1) {
           const selectableForms = species.forms.filter((form, formIndex) => form.isStarterSelectable && (caughtAttr & globalScene.gameData.getFormAttr(formIndex)));
           if (selectableForms.length === 0) {