diff --git a/src/calibre/devices/smart_device_app/driver.py b/src/calibre/devices/smart_device_app/driver.py
index 9da1ab9635..b4842876b1 100644
--- a/src/calibre/devices/smart_device_app/driver.py
+++ b/src/calibre/devices/smart_device_app/driver.py
@@ -919,6 +919,9 @@ class SMART_DEVICE_APP(DeviceConfig, DevicePlugin):
                 self.connection_attempts[peer] = 0
             except:
                 pass
+
+            self.known_metadata = {}
+            self.known_uuids = {}
             return True
         except socket.timeout:
             self._close_device_socket()