fix: update form state on getting existing mod data

src/components/ModForm.tsx

@@ -60,7 +60,7 @@ export const ModForm = ({ existingModData }: ModFormProps) => {
   const [isPublishing, setIsPublishing] = useState(false)
   const [gameOptions, setGameOptions] = useState<GameOption[]>([])
   const [formState, setFormState] = useState<ModFormState>(
-    initializeFormState(existingModData)
+    initializeFormState()
   )
   const [formErrors, setFormErrors] = useState<FormErrors>({})
 
@@ -70,6 +70,12 @@ export const ModForm = ({ existingModData }: ModFormProps) => {
     }
   }, [location.pathname]) // Only trigger when the pathname changes to submit-mod
 
+  useEffect(() => {
+    if (existingModData) {
+      setFormState(initializeFormState(existingModData))
+    }
+  }, [existingModData])
+
   useEffect(() => {
     const options = games.map((game) => ({
       label: game['Game Name'],