[shr] i did something really stupid...help needed with opkg

[Robin Paulson]

yeah, like really really dumb.

i've been taking a few packages from debian and installing them on my
shr system. all was going well, until i got to libc6. here i should
have stopped - this is a pretty critical part of any system, unlike
gphoto and other trivial stuff that i'd installed previously

my system works fine as far as i can tell - it boots, everything runs
fine, but at every opkg update && opkg upgrade i get this:

Multiple packages (libc6 and libc6) providing same name marked HOLD or
PREFER.  Using latest.
Multiple packages (libc6 and libc6) providing same name marked HOLD or
PREFER.  Using latest.
Multiple packages (libc6 and libc6) providing same name marked HOLD or
PREFER.  Using latest.
Multiple packages (libc6 and libc6) providing same name marked HOLD or
PREFER.  Using latest.
Upgrading libc6 on root from 2.6.1-r16 to 2.7-18...
Collected errors:
 * ERROR: Package libc6 (parent libc6) is not available from any configured src.
 * Failed to download libc6. Perhaps you need to run 'opkg update'?

but it never completes. i should say, all the other packages upgrade
just fine. i think the issue is with the install scripts, there are
commands in them which aren't relevant to the freerunner (dpkg for
instance), so it's never going to complete

opkg list_installed |grep libc6

returns the version from shr (2.6)

opkg install -force-reinstall and opkg install -force-downgrade give
the same messages as above

so, can anyone offer advice? i want to return to the original shr
version without re-flashing if possible

cheers