diff --git a/tests/Doctrine/Tests/ORM/Functional/Ticket/GH7719Test.php b/tests/Doctrine/Tests/ORM/Functional/Ticket/GH7719Test.php
new file mode 100644
index 00000000000..673f3dba94c
--- /dev/null
+++ b/tests/Doctrine/Tests/ORM/Functional/Ticket/GH7719Test.php
@@ -0,0 +1,85 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Functional\Ticket;
+
+use Doctrine\ORM\Annotation as ORM;
+use Doctrine\Tests\OrmFunctionalTestCase;
+
+class GH7719Test extends OrmFunctionalTestCase
+{
+    protected function setUp() : void
+    {
+        parent::setUp();
+
+        $this->setUpEntitySchema([GH7719Husband::class, GH7719Wife::class]);
+    }
+
+    public function testThatChangingTheEntityFromTheInverseSideInAOneToOneRelationDoesNotCauseUniqueIndexError()
+    {
+        $wife = new GH7719Wife();
+
+        $wife->setHusband(new GH7719Husband());
+
+        $this->em->persist($wife);
+        $this->em->flush();
+
+        $this->em->remove($wife->getHusband());
+        $wife->setHusband(new GH7719Husband());
+
+        $this->em->flush();
+    }
+}
+
+/**
+ * @ORM\Entity
+ */
+class GH7719Husband
+{
+    /**
+     * @ORM\Id
+     * @ORM\Column(type="integer")
+     * @ORM\GeneratedValue
+     */
+    private $id;
+
+    /**
+     * @ORM\OneToOne(targetEntity=GH7719Wife::class, inversedBy="husband")
+     */
+    private $wife;
+
+    public function setWife(GH7719Wife $wife): void
+    {
+        $this->wife = $wife;
+    }
+}
+
+/**
+ * @ORM\Entity
+ */
+class GH7719Wife
+{
+    /**
+     * @ORM\Id
+     * @ORM\Column(type="integer")
+     * @ORM\GeneratedValue
+     */
+    private $id;
+
+    /**
+     * @ORM\OneToOne(targetEntity=GH7719Husband::class, mappedBy="wife", cascade={"persist"})
+     */
+    private $husband;
+
+    public function setHusband(GH7719Husband $husband): void
+    {
+        $this->husband = $husband;
+        $this->husband->setWife($this);
+    }
+
+    public function getHusband(): GH7719Husband
+    {
+        return $this->husband;
+    }
+}