diff --git a/lib/private/Group/Manager.php b/lib/private/Group/Manager.php
index cb3b0d3b12a..415a38ef418 100644
--- a/lib/private/Group/Manager.php
+++ b/lib/private/Group/Manager.php
@@ -104,6 +104,14 @@ class Manager extends PublicEmitter implements IGroupManager {
 		$this->clearCaches();
 	}
 
+	#[\Override]
+	public function removeBackend(GroupInterface $backend): void {
+		$this->clearCaches();
+		if (($i = array_search($backend, $this->backends)) !== false) {
+			unset($this->backends[$i]);
+		}
+	}
+
 	#[\Override]
 	public function clearBackends() {
 		$this->backends = [];
diff --git a/lib/public/IGroupManager.php b/lib/public/IGroupManager.php
index d0ca043e923..5f2fd334759 100644
--- a/lib/public/IGroupManager.php
+++ b/lib/public/IGroupManager.php
@@ -39,6 +39,11 @@ interface IGroupManager {
 	 */
 	public function addBackend($backend);
 
+	/**
+	 * @since 34.0.0
+	 */
+	public function removeBackend(GroupInterface $backend): void;
+
 	/**
 	 * @since 8.0.0
 	 */