Buildfarm failures on chipmunk

Hi,

Recently chipmunk has failed with the following errors at [1]:

make -C '../../..'
DESTDIR='/home/pgbfarm/buildroot/HEAD/pgsql.build'/tmp_install install
>'/home/pgbfarm/buildroot/HEAD/pgsql.build'/tmp_install/log/install.log
2>&1
make -j1 checkprep
>>'/home/pgbfarm/buildroot/HEAD/pgsql.build'/tmp_install/log/install.log
2>&1
echo "# +++ regress check in src/test/regress +++" &&
PATH="/home/pgbfarm/buildroot/HEAD/pgsql.build/tmp_install/home/pgbfarm/buildroot/HEAD/inst/bin:/home/pgbfarm/buildroot/HEAD/pgsql.build/src/test/regress:$PATH"
LD_LIBRARY_PATH="/home/pgbfarm/buildroot/HEAD/pgsql.build/tmp_install/home/pgbfarm/buildroot/HEAD/inst/lib"
../../../src/test/regress/pg_regress --temp-instance=./tmp_check
--inputdir=. --bindir=
--temp-config=/tmp/buildfarm-BewC4d/bfextra.conf --no-locale
--port=5678 --dlpath=. --max-concurrent-tests=20 --port=5678
--schedule=./parallel_schedule
# +++ regress check in src/test/regress +++
# postmaster failed, examine
"/home/pgbfarm/buildroot/HEAD/pgsql.build/src/test/regress/log/postmaster.log"
for the reason
Bail out!GNUmakefile:118: recipe for target 'check' failed
make: *** [check] Error 2
log files for step check:

postmaster.log shows the following error:
2023-07-20 08:21:00.343 GMT [27063] LOG: unrecognized configuration
parameter "force_parallel_mode" in file
"/home/pgbfarm/buildroot/HEAD/pgsql.build/src/test/regress/tmp_check/data/postgresql.conf"
line 835
2023-07-20 08:21:00.344 GMT [27063] FATAL: configuration file
"/home/pgbfarm/buildroot/HEAD/pgsql.build/src/test/regress/tmp_check/data/postgresql.conf"
contains errors

[1] - https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=chipmunk&dt=2023-07-20%2006%3A48%3A23

Thoughts?

Regards,
Vignesh