Fixes

src/Psalm/Internal/PhpVisitor/Reflector/ClassLikeNodeScanner.php

@@ -1459,7 +1459,7 @@ private function visitEnumDeclaration(
 
         if (!isset($storage->enum_cases[$stmt->name->name])) {
             $case = new EnumCaseStorage(
-                $enum_value?->value,
+                $enum_value,
                 $case_location,
             );
 

src/Psalm/Storage/EnumCaseStorage.php

@@ -1,18 +1,31 @@
 <?php
 
-declare(strict_types=1);
-
 namespace Psalm\Storage;
 
 use Psalm\CodeLocation;
+use Psalm\Type\Atomic\TLiteralInt;
+use Psalm\Type\Atomic\TLiteralString;
 
 final class EnumCaseStorage
 {
-    public bool $deprecated = false;
+    /**
+     * @var TLiteralString|TLiteralInt|null
+     */
+    public $value;
+
+    /** @var CodeLocation */
+    public $stmt_location;
+
+    /**
+     * @var bool
+     */
+    public $deprecated = false;
 
     public function __construct(
-        public int|string|null $value,
-        public CodeLocation $location,
+        TLiteralString|TLiteralInt|null $value,
+        CodeLocation $location,
     ) {
+        $this->value = $value;
+        $this->stmt_location = $location;
     }
 }

src/Psalm/Type/UnionTrait.php

@@ -1212,6 +1212,7 @@ public function isSingleLiteral(): bool
 
     /**
      * @psalm-mutation-free
+     * @psalm-suppress InvalidFalsableReturnType
      */
     public function getSingleLiteral(): TLiteralInt|TLiteralString|TLiteralFloat
     {