On the 6.0 docs page we say the error code is "New in Version 6.2" which would not apply to the 6.0 branch. This behavior was added in 6.0.5.

Looking at the commit there are a few other places that may need to be updated, too.

Also, we backported this behavior to 5.0.16, but I believe DOCS-15966 was closed incorrectly because I do not see any documentation for TransactionTooLargeForCache for 5.0.