Source url ... is from different repository

Hi,

I've got two repositorys that got created from the same tar ball of
files, when I make changes to one repository I've been moving them
across to the other with 'svn diff -rx:y url | patch -p0'

I've tried to move the changes across with svn merge with the --
ignore-ancestry option, this has happily patched the files but when I
commit I get the 'Source url ... is from different repository' error
though. I thought ignore ancestry meant that the differing ancestry
of the files would be ignored. Is there any way round this or is it
back to patching with 'svn diff | patch -p0'

Thanks

---
Jeremy Wilkins
Ibex Internet Ltd
Parkside Business Park
Parkside Rd.
Kendal
Cumbria
LA9 7EN
Tel: 0845 226 8342
Fax: 08718 729374
http://www.ibexinternet.co.uk/
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