Show Version is failing in pgbouncer versions older than 1.12

[veera-chenna]

We are using pgbouncer version 1.9. And we are seeing following error in the exporter logs,
level=info ts=2021-01-28T08:33:21.015Z caller=collector.go:406 msg="Starting scrape" level=error ts=2021-01-28T08:33:21.015Z caller=collector.go:412 msg="error getting version" err="show version didn't return version column"

I can see from the change log of pgbouncer that SHOW VERSION output is changed to normal result from notice message. Is there a way we can disable this version metric or can you make it work with the older versions of pgbouncer as well?