Foreman Maintain

Hi Team,

I'm running theforman 1.2.4 and trying to upgrade to 2.0 but failed as below:
# foreman-installer

[ INFO 2020-05-13T15:23:44 verbose] Executing hooks in group pre_migrations
[ INFO 2020-05-13T15:23:44 verbose] All hooks in group pre_migrations finished
[ INFO 2020-05-13T15:23:44 verbose] Executing hooks in group boot
[ INFO 2020-05-13T15:23:44 verbose] All hooks in group boot finished
[ INFO 2020-05-13T15:23:44 verbose] Executing hooks in group init
[ INFO 2020-05-13T15:23:44 verbose] All hooks in group init finished
[ INFO 2020-05-13T15:23:44 verbose] Loading default values from puppet modules...
[ INFO 2020-05-13T15:23:44 verbose] ... finished
[ INFO 2020-05-13T15:23:44 verbose] Executing hooks in group pre_values
[ INFO 2020-05-13T15:23:44 verbose] All hooks in group pre_values finished
[ INFO 2020-05-13T15:23:44 verbose] Running installer with args "--noop", "--dont-save-answers", "--verbose"
[ INFO 2020-05-13T15:23:44 verbose] Executing hooks in group pre_validations
[ INFO 2020-05-13T15:23:45 verbose] All hooks in group pre_validations finished
[ INFO 2020-05-13T15:23:45 verbose] Running validation checks
[ INFO 2020-05-13T15:23:45 verbose] Executing hooks in group pre_commit
[ INFO 2020-05-13T15:23:45 verbose] All hooks in group pre_commit finished
[ INFO 2020-05-13T15:23:45 verbose] Executing hooks in group pre
/usr/share/ruby/psych.rb:248:in `parse': (<unknown>): did not find expected key while parsing a block mapping at line 2 column 1 (Psych::SyntaxError)
from /usr/share/ruby/psych.rb:248:in `parse_stream'
from /usr/share/ruby/psych.rb:196:in `parse'
from /usr/share/ruby/psych.rb:123:in `load'
from /usr/share/gems/gems/foreman_maintain-0.6.2/definitions/features/hammer.rb:145:in `load_from_file'
from /usr/share/gems/gems/foreman_maintain-0.6.2/definitions/features/hammer.rb:134:in `block in load_configuration'
from /usr/share/gems/gems/foreman_maintain-0.6.2/definitions/features/hammer.rb:131:in `each'
from /usr/share/gems/gems/foreman_maintain-0.6.2/definitions/features/hammer.rb:131:in `load_configuration'
from /usr/share/gems/gems/foreman_maintain-0.6.2/definitions/features/hammer.rb:18:in `initialize'
from /usr/share/gems/gems/foreman_maintain-0.6.2/lib/foreman_maintain/detector.rb:114:in `new'
from /usr/share/gems/gems/foreman_maintain-0.6.2/lib/foreman_maintain/detector.rb:114:in `detect_feature'
from /usr/share/gems/gems/foreman_maintain-0.6.2/lib/foreman_maintain/detector.rb:73:in `block in ensure_features_detected'
from /usr/share/gems/gems/foreman_maintain-0.6.2/lib/foreman_maintain/detector.rb:72:in `each_key'
from /usr/share/gems/gems/foreman_maintain-0.6.2/lib/foreman_maintain/detector.rb:72:in `ensure_features_detected'
from /usr/share/gems/gems/foreman_maintain-0.6.2/lib/foreman_maintain/detector.rb:45:in `available_procedures'
from /usr/share/gems/gems/foreman_maintain-0.6.2/lib/foreman_maintain.rb:117:in `allowed_available_procedures'
from /usr/share/gems/gems/foreman_maintain-0.6.2/lib/foreman_maintain/cli/advanced/procedure/run_command.rb:7:in `<class:RunCommand>'
from /usr/share/gems/gems/foreman_maintain-0.6.2/lib/foreman_maintain/cli/advanced/procedure/run_command.rb:6:in `<module:Procedure>'
from /usr/share/gems/gems/foreman_maintain-0.6.2/lib/foreman_maintain/cli/advanced/procedure/run_command.rb:5:in `<module:Cli>'
from /usr/share/gems/gems/foreman_maintain-0.6.2/lib/foreman_maintain/cli/advanced/procedure/run_command.rb:4:in `<module:ForemanMaintain>'
from /usr/share/gems/gems/foreman_maintain-0.6.2/lib/foreman_maintain/cli/advanced/procedure/run_command.rb:3:in `<top (required)>'
from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/share/gems/gems/foreman_maintain-0.6.2/lib/foreman_maintain/cli/advanced/procedure_command.rb:1:in `<top (required)>'
from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/share/gems/gems/foreman_maintain-0.6.2/lib/foreman_maintain/cli/advanced_command.rb:1:in `<top (required)>'
from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/share/gems/gems/foreman_maintain-0.6.2/lib/foreman_maintain/cli.rb:8:in `<top (required)>'
from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/share/gems/gems/foreman_maintain-0.6.2/bin/foreman-maintain:14:in `<top (required)>'
from /bin/foreman-maintain:23:in `load'
from /bin/foreman-maintain:23:in `<main>'
foreman-maintain service start --only=postgresql failed! Check the output for error!

Current PostgreSQL version :
[root]# rpm -qa | grep postgresql

foreman-postgresql-2.0.0-2.el7.noarch
postgresql-9.2.24-2.el7_7.x86_64
postgresql-server-9.2.24-2.el7_7.x86_64
postgresql-libs-9.2.24-2.el7_7.x86_64