CosmicPoweR

I tried  to downgrade my the firmware but TV shows update failed because SW version is lower than the TV SW version. Anyone can help? Thanks!!

Model: LG 49UB850T
Current TV SW version: 05.05.90

NUS Request
<REQUEST>
 <PRODUCT_NM>webOS</PRODUCT_NM>
 <MODEL_NM>HE_DTV_WT1H_AFAAABAA</MODEL_NM>
 <SW_TYPE>FIRMWARE</SW_TYPE>
 <MAJOR_VER>05</MAJOR_VER>
 <MINOR_VER>05.90</MINOR_VER>
 <COUNTRY>MY</COUNTRY>
 <AUTH_FLAG>N</AUTH_FLAG>
 <IGNORE_DISABLE>N</IGNORE_DISABLE>
 <ECO_INFO>01</ECO_INFO>
 <CONFIG_KEY>00</CONFIG_KEY>
 <LANGUAGE_CODE>en-MY</LANGUAGE_CODE>
</REQUEST>

NUS Reply for HE_DTV_WT1H_AFAAABAA-0.req
<RESPONSE>
 <RESULT_CD>900</RESULT_CD>
 <MSG>Success</MSG>
 <REQ_ID>882674538</REQ_ID>
 <IMAGE_URL>http://snu.lge.com/epks/</IMAGE_URL>
 <IMAGE_SIZE>662123743</IMAGE_SIZE>
 <IMAGE_NAME>starfish-dvb-secured-goldfinger-23.ashley.goldfinger-2309-05.00.25-prodkey_usb_V3_SECURED.epk</IMAGE_NAME>
 <UPDATE_MAJOR_VER>05</UPDATE_MAJOR_VER>
 <UPDATE_MINOR_VER>5.91</UPDATE_MINOR_VER>
 <FORCE_FLAG>Y</FORCE_FLAG>
 <KE></KE>
 <GMT>26 Jul 2020 11:34:06 GMT</GMT>
 <ECO_INFO>01</ECO_INFO>
 <CDN_URL>http://snu.lge.com/epks/starfish-dvb-secured-goldfinger-23.ashley.goldfinger-2309-05.00.25-prodkey_usb_V3_SECURED.epk</CDN_URL>
 <CONTENTS></CONTENTS>
</RESPONSE>

Log:

26-07-20 13:34:06    Got NSU Request from 127.0.0.1
26-07-20 13:34:06    Parsing Request...
26-07-20 13:34:06    #### Request Details ####
26-07-20 13:34:06    #  Product Name: webOS
26-07-20 13:34:06    #  Model Name HE_DTV_WT1H_AFAAABAA
26-07-20 13:34:06    #  Software Type FIRMWARE
26-07-20 13:34:06    #  Version Major 05
26-07-20 13:34:06    #  Version Minor 05.90
26-07-20 13:34:06    #  Country MY
26-07-20 13:34:06    #  Device ID
26-07-20 13:34:06    #  Auth Flag N
26-07-20 13:34:06    #  Ignore Disable N
26-07-20 13:34:06    #  Eco Info 01
26-07-20 13:34:06    #  Config Key 00
26-07-20 13:34:06    #  Language Code en-MY
26-07-20 13:34:06    #### END ####
26-07-20 13:34:06    Skipping Request dump (same data already on disk)
26-07-20 13:34:06    Found @ALL_OVERRIDE, providing starfish-dvb-secured-goldfinger-23.ashley.goldfinger-2309-05.00.25-prodkey_usb_V3_SECURED.epk for HE_DTV_WT1H_AFAAABAA
26-07-20 13:34:06    Providing epk file epks/starfish-dvb-secured-goldfinger-23.ashley.goldfinger-2309-05.00.25-prodkey_usb_V3_SECURED.epk
26-07-20 13:34:06    Built Response: 
26-07-20 13:34:06    <RESPONSE><RESULT_CD>900</RESULT_CD><MSG>Success</MSG><REQ_ID>882674538</REQ_ID><IMAGE_URL>http://snu.lge.com/epks/</IMAGE_URL><IMAGE_SIZE>662123743</IMAGE_SIZE><IMAGE_NAME>starfish-dvb-secured-goldfinger-23.ashley.goldfinger-2309-05.00.25-prodkey_usb_V3_SECURED.epk</IMAGE_NAME><UPDATE_MAJOR_VER>05</UPDATE_MAJOR_VER><UPDATE_MINOR_VER>5.91</UPDATE_MINOR_VER><FORCE_FLAG>Y</FORCE_FLAG><KE></KE><GMT>26 Jul 2020 11:34:06 GMT</GMT><ECO_INFO>01</ECO_INFO><CDN_URL>http://snu.lge.com/epks/starfish-dvb-secured-goldfinger-23.ashley.goldfinger-2309-05.00.25-prodkey_usb_V3_SECURED.epk</CDN_URL><CONTENTS></CONTENTS></RESPONSE>
26-07-20 13:34:06    Sending Response...

 

Release webOS 2.0 upgrade for 49UB850T.
Thanks!