Urgent problem with ext3 filesystem!!!

[G-Point]

hello,
when i boot my pc, it stops on root filesystem check, because it says that a
file has "6 multiply-claimed block(s), shared with 0 file(s)"
so i can't boot linux.
i don't want to delete that file, how can i solve my problem?
copying that file to another partition?
running fsck or ex2fsck?

i tried to log in as root and typed fsck -n (assuming "no" to all questions,
you know) and i saw that it first asks: "clone multiply-claimed block(s)?"
and then : "delete file?"

what can i do?
cloning them will damage anything?

help me please!
thanks a lot

best regards.
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