Yesterday suddenly my browser crashed and several apps wouldn't start, so I rebooted the phone and got the "Device not working properly" message.

Trying to flash the phone I receive a "Downgrade disallowed" message although the version/variant number is higher or am I blind and/or stupid?

sudo flasher -f -F 34417842_DFL61_HARMATTAN_40.2012.21-3.430.01.1_PR_LEGACY_430_ARM_RM-696_PRD_signed.bin
flasher 3.12.1 (Oct 5 2011) Harmattan
WARNING: This tool is intended for professional use only. Using it may result
in permanently damaging your device or losing the warranty.

USB device found at bus 008, device address 014.
Device identifier: 357923041477417 (SN: N/A)
Found device RM-696, hardware revision 1603
NOLO version 2.3.6
Version of 'sw-release': DFL61_HARMATTAN_40.2012.21-3.350.3_PR_350
Sending ape-algo image (7103 kB)...
100% (7103 of 7103 kB, avg. 33664 kB/s)
Suitable USB interface (phonet) not found, waiting...
USB device found at bus 008, device address 015.
Device identifier: 357923041477417 (SN: N/A)
Raw data transfer EP found at EP2.
Ping attempt 1 (250 ms)
Server application: 1.7.2
Found product RM-696 rev. 1603
Server implements softupd protocol version 1.8
Image SW version DFL61_HARMATTAN_40.2012.21-3.430.01.1_PR_430
Image moslo not present
Image mmc not present
Image tar skipped
Image config skipped

Battery level 43 %, continuing.

image [state progress transfer flash speed]
---------------------------------------------------------------------
[_] cert-sw [init 0 % 0 / 0 kB NA ]
[ ] cmt-2nd [pending 0 % 0 / 0 kB NA ]
[ ] cmt-algo [pending 0 % 0 / 0 kB NA ]
[ ] cmt-mcusw [pending 0 % 0 / 0 kB NA ]
[ ] xloader [pending 0 % 0 / 0 kB NA ]
[ ] secondary [pending 0 % 0 / 0 kB NA ]
[ ] kernel [pending 0 % 0 / 0 kB NA ]
[ ] rootfs [pending 0 % 0 / 0 kB NA ]
ERROR: SU_GET_UPDATE_STATUS_REQ terminated with error code 10: Security failure

image [state progress transfer flash speed]
---------------------------------------------------------------------
[f] cert-sw [init 0 % 1 / 1 kB NA ]
[ ] cmt-2nd [pending 0 % 0 / 0 kB NA ]
[ ] cmt-algo [pending 0 % 0 / 0 kB NA ]
[ ] cmt-mcusw [pending 0 % 0 / 0 kB NA ]
[ ] xloader [pending 0 % 0 / 0 kB NA ]
[ ] secondary [pending 0 % 0 / 0 kB NA ]
[ ] kernel [pending 0 % 0 / 0 kB NA ]
[ ] rootfs [pending 0 % 0 / 0 kB NA ]
Fetching error list:
========================================
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
Downgrade disallowed (1354010096)
[Pipe 0] Finishing in error state with status 10
========================================

ERROR: Failed to flash images



Why is that and what can I do now?