Hi,
There's nothing to fix. Zen Cart manages the session ID using the zenid query string parameter.
You cannot change this behaviour so just ignore it! Google et al should be familiar with the idea that sites issue a session ID on initial links, I'd imagine this behaviour is ignored by them (I don't know for sure but the point is moot as you can't do anything about it).
All the best..
Conor
ceon
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