Cannot pair and connect headset

Hello!

I have a bluetooth headset SONY MDR-XB650BT and I cannot pair and connect it.

I got it several months ago and it worked well, I configured it using
blueman-manager but now I cannot.

Hardware:
02:00.0 Network controller: Intel Corporation Wireless 7265 (rev 59)
Subsystem: Intel Corporation Dual Band Wireless-AC 7265
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi

Software:
Debian Stretch 9.6
Linux gregf 4.18.0-0.bpo.1-amd64 #1 SMP Debian 4.18.6-1~bpo9+1
(2018-09-13) x86_64 GNU/Linux
ii  blueman                               2.0.4-1
     amd64        Graphical bluetooth manager
ii  bluetooth                             5.43-2+deb9u1
     all          Bluetooth support
ii  bluez                                 5.43-2+deb9u1
     amd64        Bluetooth tools and daemons
ii  bluez-firmware                        1.2-3
     all          Firmware for Bluetooth devices
ii  bluez-hcidump                         5.43-2+deb9u1
     amd64        Analyses Bluetooth HCI packets
ii  bluez-obexd                           5.43-2+deb9u1
     amd64        bluez obex daemon
ii  bluez-tools                           0.2.0~20140808-5+b2
     amd64        Set of tools to manage Bluetooth devices for linux
ii  libbluetooth3:amd64                   5.43-2+deb9u1
     amd64        Library to use the BlueZ Linux Bluetooth stack
ii  pulseaudio-module-bluetooth           10.0-1+deb9u1
     amd64        Bluetooth module for PulseAudio sound server
ii  python-bluez                          0.22-1
     amd64        Python wrappers around BlueZ for rapid bluetooth
development

This is part of my logs: https://pastebin.com/xPnm6SgW

I'm trying to do it via `bluetoothctl` but get something like:
[bluetooth]# info 00:18:09:C5:44:1E
Device 00:18:09:C5:44:1E
Name: MDR-XB650BT
Alias: MDR-XB650BT
Class: 0x240404
Icon: audio-card
Paired: no
Trusted: no
Blocked: no
Connected: no
LegacyPairing: no
UUID: Headset                   (00001108-0000-1000-8000-00805f9b34fb)
UUID: Audio Sink                (0000110b-0000-1000-8000-00805f9b34fb)
UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9b34fb)
UUID: A/V Remote Control        (0000110e-0000-1000-8000-00805f9b34fb)
UUID: Handsfree                 (0000111e-0000-1000-8000-00805f9b34fb)
[bluetooth]# agent on
Agent registered
[bluetooth]# trust 00:18:09:C5:44:1E
[CHG] Device 00:18:09:C5:44:1E Trusted: yes
Changing 00:18:09:C5:44:1E trust succeeded
[bluetooth]# pair 00:18:09:C5:44:1E
Attempting to pair with 00:18:09:C5:44:1E
[CHG] Device 00:18:09:C5:44:1E Connected: yes
Failed to pair: org.bluez.Error.AuthenticationFailed
[CHG] Device 00:18:09:C5:44:1E Connected: no
[CHG] Device 00:18:09:C5:44:1E Connected: yes
[CHG] Device 00:18:09:C5:44:1E Connected: no
[bluetooth]# pair 00:18:09:C5:44:1E
Attempting to pair with 00:18:09:C5:44:1E
[CHG] Device 00:18:09:C5:44:1E Connected: yes
Failed to pair: org.bluez.Error.AuthenticationFailed
[CHG] Device 00:18:09:C5:44:1E Connected: no

I'm sure it works but how to detect the reason why it cannot now, I
got out of my hairs. Could you help me, please?

Thank you!