diff --git a/composer.json b/composer.json
index 71771886d0c..ece1f0f3b57 100644
--- a/composer.json
+++ b/composer.json
@@ -42,13 +42,13 @@
         "doctrine/annotations": "^1.13",
         "doctrine/coding-standard": "^9.0",
         "phpbench/phpbench": "^0.16.10 || ^1.0",
-        "phpstan/phpstan": "~1.4.10 || 1.8.0",
+        "phpstan/phpstan": "~1.4.10 || 1.8.2",
         "phpunit/phpunit": "^7.5 || ^8.5 || ^9.5",
         "psr/log": "^1 || ^2 || ^3",
         "squizlabs/php_codesniffer": "3.7.1",
         "symfony/cache": "^4.4 || ^5.4 || ^6.0",
         "symfony/yaml": "^3.4 || ^4.0 || ^5.0 || ^6.0",
-        "vimeo/psalm": "4.24.0"
+        "vimeo/psalm": "4.25.0"
     },
     "conflict": {
         "doctrine/annotations": "<1.13 || >= 2.0"
diff --git a/lib/Doctrine/ORM/Cache/DefaultEntityHydrator.php b/lib/Doctrine/ORM/Cache/DefaultEntityHydrator.php
index 384664fa5e6..5e8baf18b29 100644
--- a/lib/Doctrine/ORM/Cache/DefaultEntityHydrator.php
+++ b/lib/Doctrine/ORM/Cache/DefaultEntityHydrator.php
@@ -12,6 +12,7 @@
 use Doctrine\ORM\Utility\IdentifierFlattener;
 
 use function array_merge;
+use function assert;
 use function is_array;
 use function is_object;
 use function reset;
@@ -57,6 +58,7 @@ public function buildCacheEntry(ClassMetadata $metadata, EntityCacheKey $key, $e
 
         if ($metadata->requiresFetchAfterChange) {
             if ($metadata->isVersioned) {
+                assert($metadata->versionField !== null);
                 $data[$metadata->versionField] = $metadata->getFieldValue($entity, $metadata->versionField);
             }
 
diff --git a/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php b/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php
index 81eaa99bb60..f6633bd4d59 100644
--- a/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php
+++ b/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php
@@ -748,7 +748,7 @@ class ClassMetadataInfo implements ClassMetadata
     /**
      * READ-ONLY: The name of the field which is used for versioning in optimistic locking (if any).
      *
-     * @var mixed
+     * @var string|null
      */
     public $versionField;
 
@@ -3553,7 +3553,7 @@ public function setVersioned($bool)
      * Sets the name of the field that is to be used for versioning if this class is
      * versioned for optimistic locking.
      *
-     * @param string $versionField
+     * @param string|null $versionField
      *
      * @return void
      */
diff --git a/lib/Doctrine/ORM/Persisters/Entity/BasicEntityPersister.php b/lib/Doctrine/ORM/Persisters/Entity/BasicEntityPersister.php
index 7b74ea8bf9c..bb974993133 100644
--- a/lib/Doctrine/ORM/Persisters/Entity/BasicEntityPersister.php
+++ b/lib/Doctrine/ORM/Persisters/Entity/BasicEntityPersister.php
@@ -494,7 +494,8 @@ final protected function updateTable(
         }
 
         if ($versioned) {
-            $versionField     = $this->class->versionField;
+            $versionField = $this->class->versionField;
+            assert($versionField !== null);
             $versionFieldType = $this->class->fieldMappings[$versionField]['type'];
             $versionColumn    = $this->quoteStrategy->getColumnName($versionField, $this->class, $this->platform);
 
diff --git a/lib/Doctrine/ORM/UnitOfWork.php b/lib/Doctrine/ORM/UnitOfWork.php
index ebae750af07..da456187504 100644
--- a/lib/Doctrine/ORM/UnitOfWork.php
+++ b/lib/Doctrine/ORM/UnitOfWork.php
@@ -55,6 +55,7 @@
 use function array_pop;
 use function array_sum;
 use function array_values;
+use function assert;
 use function count;
 use function current;
 use function get_class;
@@ -1615,6 +1616,8 @@ public function getEntityState($entity, $assume = null)
             case $class->isIdentifierNatural():
                 // Check for a version field, if available, to avoid a db lookup.
                 if ($class->isVersioned) {
+                    assert($class->versionField !== null);
+
                     return $class->getFieldValue($entity, $class->versionField)
                         ? self::STATE_DETACHED
                         : self::STATE_NEW;
@@ -2064,6 +2067,7 @@ private function ensureVersionMatch(
             return;
         }
 
+        assert($class->versionField !== null);
         $reflField          = $class->reflFields[$class->versionField];
         $managedCopyVersion = $reflField->getValue($managedCopy);
         $entityVersion      = $reflField->getValue($entity);
@@ -2498,6 +2502,7 @@ public function lock($entity, int $lockMode, $lockVersion = null): void
                     $entity->__load();
                 }
 
+                assert($class->versionField !== null);
                 $entityVersion = $class->reflFields[$class->versionField]->getValue($entity);
 
                 // phpcs:ignore SlevomatCodingStandard.Operators.DisallowEqualOperators.DisallowedNotEqualOperator
diff --git a/psalm-baseline.xml b/psalm-baseline.xml
index ad0bb9a1798..3ef5bf9d05c 100644
--- a/psalm-baseline.xml
+++ b/psalm-baseline.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<files psalm-version="4.24.0@06dd975cb55d36af80f242561738f16c5f58264f">
+<files psalm-version="v4.25.0@d7cd84c4ebca74ba3419b9601f81d177bcbe2aac">
   <file src="lib/Doctrine/ORM/AbstractQuery.php">
     <DeprecatedClass occurrences="1">
       <code>IterableResult</code>
@@ -281,13 +281,10 @@
     </TooManyArguments>
   </file>
   <file src="lib/Doctrine/ORM/EntityManager.php">
-    <ArgumentTypeCoercion occurrences="6">
+    <ArgumentTypeCoercion occurrences="3">
       <code>$className</code>
       <code>$connection</code>
       <code>$entityName</code>
-      <code>ltrim($className, '\\')</code>
-      <code>ltrim($entityName, '\\')</code>
-      <code>ltrim($entityName, '\\')</code>
     </ArgumentTypeCoercion>
     <DeprecatedMethod occurrences="2">
       <code>getMetadataCacheImpl</code>
@@ -696,10 +693,9 @@
       <code>$table</code>
       <code>$tableGeneratorDefinition</code>
     </PropertyNotSetInConstructor>
-    <PropertyTypeCoercion occurrences="13">
+    <PropertyTypeCoercion occurrences="12">
       <code>$this-&gt;associationMappings</code>
       <code>$this-&gt;associationMappings</code>
-      <code>$this-&gt;discriminatorMap</code>
       <code>$this-&gt;entityListeners</code>
       <code>$this-&gt;fieldMappings</code>
       <code>$this-&gt;fullyQualifiedClassName($repositoryClassName)</code>
@@ -1028,6 +1024,10 @@
     </MissingParamType>
   </file>
   <file src="lib/Doctrine/ORM/Mapping/MappingException.php">
+    <ArgumentTypeCoercion occurrences="2">
+      <code>$className</code>
+      <code>$entityName</code>
+    </ArgumentTypeCoercion>
     <MissingParamType occurrences="4">
       <code>$className</code>
       <code>$className</code>