[Foundation-l] GFDL Version issue: Can simply syncing GFDL Licence document solve GFDL version imcompatibility?

[PiaCarrot]

Each article on most editions on wikipedia are licenced under
"GFDL 1.2 or later", but articles on ja.wp are currently licenced
under "GFDL 1.1 or later". But, some images and some articles 
on ja.wp are duplicated from other language edition of wikipedia,
it seems GFDL violation because GFDL version imcompatibility.
("Permission is granted to use under GFDL 1.2 or later" can be
read "Permission isn't granted under GFDL 1.1 or prior")

If licence on ja.wp shifted to "GFDL 1.2 or later" simply,
can their "Duplicated articles and images" be relieved
from  GFDL version imcompatibility because article 9 of
GFDL licence?
(Can article 9 of GFDL licence used to relieve them from
GFDL version imcompatibility?)

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PiaCarrot at ja/en/ja.wiktionary
E-Mail:nao-yuki a-t beige.plala.or.jp