pg error question

PG Doc comments form <[email protected]> Mon, 14 Oct 2019 09:35:28 +0000
Newsgroups gmane.comp.db.postgresql.devel.documentation
Message-ID <[email protected]>
The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/10/errcodes-appendix.html
Description:

when we use pgsql 

a error happens

ERROR: XX000: unrecognized node type: 68