fix: fix moving mountpoints

Signed-off-by: Robin Appelman <robin@icewind.nl>

Author: icewind1991

lib/private/Files/Mount/Manager.php

@@ -59,13 +59,14 @@ public function removeMount(string $mountPoint): void {
 	}
 
 	public function moveMount(string $mountPoint, string $target): void {
-		if (isset($this->mounts[$mountPoint])) {
+		if ($mountPoint !== $target && isset($this->mounts[$mountPoint])) {
 			$this->mounts[$target] = $this->mounts[$mountPoint];
+			$this->mounts[$target]->setMountPoint($target);
 			unset($this->mounts[$mountPoint]);
+			$this->pathCache->clear();
+			$this->inPathCache->clear();
+			$this->areMountsSorted = false;
 		}
-		$this->pathCache->clear();
-		$this->inPathCache->clear();
-		$this->areMountsSorted = false;
 	}
 
 	/**