diff --git a/src/Cache/Persister/Entity/AbstractEntityPersister.php b/src/Cache/Persister/Entity/AbstractEntityPersister.php
index 945ad5b348b..b878c36b261 100644
--- a/src/Cache/Persister/Entity/AbstractEntityPersister.php
+++ b/src/Cache/Persister/Entity/AbstractEntityPersister.php
@@ -371,7 +371,7 @@ public function loadAll(
     /**
      * {@inheritDoc}
      */
-    public function loadById(array $identifier, object|null $entity = null): object|null
+    public function loadById(array $identifier, object|null $entity = null, bool $readOnly = false): object|null
     {
         $cacheKey   = new EntityCacheKey($this->class->rootEntityName, $identifier);
         $cacheEntry = $this->region->get($cacheKey);
@@ -391,7 +391,7 @@ public function loadById(array $identifier, object|null $entity = null): object|
             }
         }
 
-        $entity = $this->persister->loadById($identifier, $entity);
+        $entity = $this->persister->loadById($identifier, $entity, $readOnly);
 
         if ($entity === null) {
             return null;
diff --git a/src/Decorator/EntityManagerDecorator.php b/src/Decorator/EntityManagerDecorator.php
index 6f1b0419686..436acf25537 100644
--- a/src/Decorator/EntityManagerDecorator.php
+++ b/src/Decorator/EntityManagerDecorator.php
@@ -112,9 +112,9 @@ public function lock(object $entity, LockMode|int $lockMode, DateTimeInterface|i
         $this->wrapped->lock($entity, $lockMode, $lockVersion);
     }
 
-    public function find(string $className, mixed $id, LockMode|int|null $lockMode = null, int|null $lockVersion = null): object|null
+    public function find(string $className, mixed $id, LockMode|int|null $lockMode = null, int|null $lockVersion = null, bool $readOnly = false): object|null
     {
-        return $this->wrapped->find($className, $id, $lockMode, $lockVersion);
+        return $this->wrapped->find($className, $id, $lockMode, $lockVersion, $readOnly);
     }
 
     public function refresh(object $object, LockMode|int|null $lockMode = null): void
diff --git a/src/EntityManager.php b/src/EntityManager.php
index 2e160393417..0dd50db83dd 100644
--- a/src/EntityManager.php
+++ b/src/EntityManager.php
@@ -271,7 +271,7 @@ public function flush(): void
     /**
      * {@inheritDoc}
      */
-    public function find($className, mixed $id, LockMode|int|null $lockMode = null, int|null $lockVersion = null): object|null
+    public function find($className, mixed $id, LockMode|int|null $lockMode = null, int|null $lockVersion = null, bool $readOnly = false): object|null
     {
         $class = $this->metadataFactory->getMetadataFor(ltrim($className, '\\'));
 
@@ -343,6 +343,10 @@ public function find($className, mixed $id, LockMode|int|null $lockMode = null,
                     break;
             }
 
+            if (! $readOnly && $unitOfWork->isReadOnly($entity)) {
+                $unitOfWork->unmarkReadOnly($entity);
+            }
+
             return $entity; // Hit!
         }
 
@@ -350,7 +354,7 @@ public function find($className, mixed $id, LockMode|int|null $lockMode = null,
 
         switch (true) {
             case $lockMode === LockMode::OPTIMISTIC:
-                $entity = $persister->load($sortedId);
+                $entity = $persister->load($sortedId, hints: [Query::HINT_READ_ONLY => $readOnly]);
 
                 if ($entity !== null) {
                     $unitOfWork->lock($entity, $lockMode, $lockVersion);
@@ -360,10 +364,10 @@ public function find($className, mixed $id, LockMode|int|null $lockMode = null,
 
             case $lockMode === LockMode::PESSIMISTIC_READ:
             case $lockMode === LockMode::PESSIMISTIC_WRITE:
-                return $persister->load($sortedId, null, null, [], $lockMode);
+                return $persister->load($sortedId, null, null, [Query::HINT_READ_ONLY => $readOnly], $lockMode);
 
             default:
-                return $persister->loadById($sortedId);
+                return $persister->loadById($sortedId, readOnly: $readOnly);
         }
     }
 
diff --git a/src/EntityManagerInterface.php b/src/EntityManagerInterface.php
index 03dbdbbea19..06ef58fe670 100644
--- a/src/EntityManagerInterface.php
+++ b/src/EntityManagerInterface.php
@@ -130,7 +130,7 @@ public function createQueryBuilder(): QueryBuilder;
      *
      * @template T of object
      */
-    public function find(string $className, mixed $id, LockMode|int|null $lockMode = null, int|null $lockVersion = null): object|null;
+    public function find(string $className, mixed $id, LockMode|int|null $lockMode = null, int|null $lockVersion = null, bool $readOnly = false): object|null;
 
     /**
      * Refreshes the persistent state of an object from the database,
diff --git a/src/Persisters/Entity/BasicEntityPersister.php b/src/Persisters/Entity/BasicEntityPersister.php
index 4670a62a9e8..9303c24373f 100644
--- a/src/Persisters/Entity/BasicEntityPersister.php
+++ b/src/Persisters/Entity/BasicEntityPersister.php
@@ -748,9 +748,9 @@ public function load(
     /**
      * {@inheritDoc}
      */
-    public function loadById(array $identifier, object|null $entity = null): object|null
+    public function loadById(array $identifier, object|null $entity = null, bool $readOnly = false): object|null
     {
-        return $this->load($identifier, $entity);
+        return $this->load($identifier, $entity, hints: [Query::HINT_READ_ONLY => $readOnly]);
     }
 
     /**
diff --git a/src/Persisters/Entity/EntityPersister.php b/src/Persisters/Entity/EntityPersister.php
index 1c4da2f4c04..bdf305579b9 100644
--- a/src/Persisters/Entity/EntityPersister.php
+++ b/src/Persisters/Entity/EntityPersister.php
@@ -182,7 +182,7 @@ public function load(
      *
      * @todo Check parameters
      */
-    public function loadById(array $identifier, object|null $entity = null): object|null;
+    public function loadById(array $identifier, object|null $entity = null, bool $readOnly = false): object|null;
 
     /**
      * Loads an entity of this persister's mapped class as part of a single-valued
diff --git a/src/UnitOfWork.php b/src/UnitOfWork.php
index 4c55b728775..2926a44e164 100644
--- a/src/UnitOfWork.php
+++ b/src/UnitOfWork.php
@@ -3080,9 +3080,6 @@ private static function objToStr(object $obj): string
     /**
      * Marks an entity as read-only so that it will not be considered for updates during UnitOfWork#commit().
      *
-     * This operation cannot be undone as some parts of the UnitOfWork now keep gathering information
-     * on this object that might be necessary to perform a correct update.
-     *
      * @throws ORMInvalidArgumentException
      */
     public function markReadOnly(object $object): void
@@ -3094,6 +3091,21 @@ public function markReadOnly(object $object): void
         $this->readOnlyObjects[spl_object_id($object)] = true;
     }
 
+    /**
+     * Unmarks an entity as read-only so that it will be considered for updates during UnitOfWork#commit()
+     * even if it was previously fetched as read-only.
+     *
+     * @throws ORMInvalidArgumentException
+     */
+    public function unmarkReadOnly(object $object): void
+    {
+        if (! $this->isInIdentityMap($object)) {
+            throw ORMInvalidArgumentException::readOnlyRequiresManagedEntity($object);
+        }
+
+        unset($this->readOnlyObjects[spl_object_id($object)]);
+    }
+
     /**
      * Is this entity read only?
      *
diff --git a/tests/Performance/Mock/NonLoadingPersister.php b/tests/Performance/Mock/NonLoadingPersister.php
index bf487978c9f..d0c51d497f9 100644
--- a/tests/Performance/Mock/NonLoadingPersister.php
+++ b/tests/Performance/Mock/NonLoadingPersister.php
@@ -18,7 +18,7 @@ public function __construct(
         $this->class = $class;
     }
 
-    public function loadById(array $identifier, object|null $entity = null): object|null
+    public function loadById(array $identifier, object|null $entity = null, bool $readOnly = false): object|null
     {
         return $entity ?? new ($this->class->name)();
     }
diff --git a/tests/Performance/Mock/NonProxyLoadingEntityManager.php b/tests/Performance/Mock/NonProxyLoadingEntityManager.php
index bff330ab9be..b38ec760703 100644
--- a/tests/Performance/Mock/NonProxyLoadingEntityManager.php
+++ b/tests/Performance/Mock/NonProxyLoadingEntityManager.php
@@ -163,9 +163,9 @@ public function hasFilters(): bool
         return $this->realEntityManager->hasFilters();
     }
 
-    public function find(string $className, mixed $id, LockMode|int|null $lockMode = null, int|null $lockVersion = null): object|null
+    public function find(string $className, mixed $id, LockMode|int|null $lockMode = null, int|null $lockVersion = null, bool $readOnly = false): object|null
     {
-        return $this->realEntityManager->find($className, $id, $lockMode, $lockVersion);
+        return $this->realEntityManager->find($className, $id, $lockMode, $lockVersion, $readOnly);
     }
 
     public function persist(object $object): void
diff --git a/tests/Tests/ORM/Functional/ReadOnlyTest.php b/tests/Tests/ORM/Functional/ReadOnlyTest.php
index 7a27a8b2605..ba2aba705c1 100644
--- a/tests/Tests/ORM/Functional/ReadOnlyTest.php
+++ b/tests/Tests/ORM/Functional/ReadOnlyTest.php
@@ -37,7 +37,7 @@ public function testReadOnlyEntityNeverChangeTracked(): void
         $this->_em->flush();
         $this->_em->clear();
 
-        $dbReadOnly = $this->_em->find(ReadOnlyEntity::class, $readOnly->id);
+        $dbReadOnly = $this->getWithoutReadOnlyHint($readOnly->id);
         self::assertEquals('Test1', $dbReadOnly->name);
         self::assertEquals(1234, $dbReadOnly->numericValue);
     }
@@ -77,13 +77,7 @@ public function testReadOnlyQueryHint(): void
         $this->_em->flush();
         $this->_em->clear();
 
-        $dql = 'SELECT u FROM ' . ReadOnlyEntity::class . ' u WHERE u.id = ?1';
-
-        $query = $this->_em->createQuery($dql);
-        $query->setParameter(1, $user->id);
-        $query->setHint(Query::HINT_READ_ONLY, true);
-
-        $user = $query->getSingleResult();
+        $user = $this->getWithReadOnlyHint($user->id, readOnly: true);
 
         self::assertTrue($this->_em->getUnitOfWork()->isReadOnly($user));
     }
@@ -97,11 +91,7 @@ public function testNotReadOnlyQueryHint(): void
         $this->_em->flush();
         $this->_em->clear();
 
-        $query = $this->_em->createQuery('SELECT u FROM ' . ReadOnlyEntity::class . ' u WHERE u.id = ?1');
-        $query->setParameter(1, $user->id);
-        $query->setHint(Query::HINT_READ_ONLY, false);
-
-        $user = $query->getSingleResult();
+        $user = $this->getWithReadOnlyHint($user->id, readOnly: false);
 
         self::assertFalse($this->_em->getUnitOfWork()->isReadOnly($user));
     }
@@ -117,13 +107,7 @@ public function testNotReadOnlyIfObjectWasProxyBefore(): void
 
         $user = $this->_em->getReference(ReadOnlyEntity::class, $user->id);
 
-        $dql = 'SELECT u FROM ' . ReadOnlyEntity::class . ' u WHERE u.id = ?1';
-
-        $query = $this->_em->createQuery($dql);
-        $query->setParameter(1, $user->id);
-        $query->setHint(Query::HINT_READ_ONLY, true);
-
-        $user = $query->getSingleResult();
+        $user = $this->getWithReadOnlyHint($user->id, readOnly: true);
 
         self::assertFalse($this->_em->getUnitOfWork()->isReadOnly($user));
     }
@@ -137,18 +121,43 @@ public function testNotReadOnlyIfObjectWasKnownBefore(): void
         $this->_em->flush();
         $this->_em->clear();
 
-        $userIntoIdentityMap = $this->_em->find(ReadOnlyEntity::class, $user->id);
+        $userIntoIdentityMap = $this->getWithoutReadOnlyHint($user->id);
 
-        $dql = 'SELECT u FROM ' . ReadOnlyEntity::class . ' u WHERE u.id = ?1';
+        $user = $this->getWithReadOnlyHint($user->id, readOnly: true);
 
-        $query = $this->_em->createQuery($dql);
-        $query->setParameter(1, $user->id);
-        $query->setHint(Query::HINT_READ_ONLY, true);
+        self::assertFalse($this->_em->getUnitOfWork()->isReadOnly($user));
+    }
+
+    public function testWriteableEvenIfObjectWasKnownAsReadOnlyBefore(): void
+    {
+        $user = new ReadOnlyEntity('Théo', 1234);
 
-        $user = $query->getSingleResult();
+        $this->_em->persist($user);
+
+        $this->_em->flush();
+        $this->_em->clear();
+
+        $userIntoIdentityMap = $this->getWithReadOnlyHint($user->id, readOnly: true);
+        $user                = $this->getWithoutReadOnlyHint($user->id);
 
         self::assertFalse($this->_em->getUnitOfWork()->isReadOnly($user));
     }
+
+    private function getWithoutReadOnlyHint(int $id): ReadOnlyEntity
+    {
+        return $this->_em->find(ReadOnlyEntity::class, $id);
+    }
+
+    private function getWithReadOnlyHint(int $id, bool $readOnly): ReadOnlyEntity
+    {
+        $dql = 'SELECT u FROM ' . ReadOnlyEntity::class . ' u WHERE u.id = ?1';
+
+        $query = $this->_em->createQuery($dql);
+        $query->setParameter(1, $id);
+        $query->setHint(Query::HINT_READ_ONLY, $readOnly);
+
+        return $query->getSingleResult();
+    }
 }
 
 #[Entity(readOnly: true)]