Error in agent bakery plugin file apt: leading zeros in decimal integer literals are not permitted

It is an own created Bakery plugin, we have upgraded from 1.6 to 2.0 . Below is the result of
“cmk --debug -vvR” command

OK
Baking agents…Error in agent bakery plugin file apt: leading zeros in decimal integer literals are not permitted; use an 0o prefix for octal integers (, line 10)
Releasing lock on /omd/sites/kaikaito/etc/check_mk/main.mk
Released lock on /omd/sites/kaikaito/etc/check_mk/main.mk
Try aquire lock on /omd/sites/kaikaito/var/check_mk/crashes/base/3cb27504-8881-11eb-83e0-00155dd05907/crash.info
Got lock on /omd/sites/kaikaito/var/check_mk/crashes/base/3cb27504-8881-11eb-83e0-00155dd05907/crash.info
Releasing lock on /omd/sites/kaikaito/var/check_mk/crashes/base/3cb27504-8881-11eb-83e0-00155dd05907/crash.info
Released lock on /omd/sites/kaikaito/var/check_mk/crashes/base/3cb27504-8881-11eb-83e0-00155dd05907/crash.info
Traceback (most recent call last):
File “/omd/sites/kaikaito/bin/cmk”, line 92, in
exit_status = modes.call(mode_name, mode_args, opts, args)
File “/omd/sites/kaikaito/lib/python3/cmk/base/modes/init.py”, line 69, in call
return handler(*handler_args)
File “/omd/sites/kaikaito/lib/python3/cmk/base/modes/check_mk.py”, line 1152, in mode_restart
cmk.base.core.do_restart(create_core(config.monitoring_core))
File “/omd/sites/kaikaito/lib/python3/cmk/base/core.py”, line 59, in do_restart
core_config.do_create_config(core)
File “/omd/sites/kaikaito/lib/python3/cmk/base/core_config.py”, line 343, in do_create_config
_bake_on_restart()
File “/omd/sites/kaikaito/lib/python3/cmk/base/core_config.py”, line 350, in _bake_on_restart
agent_bakery.bake_on_restart()
File “/omd/sites/kaikaito/lib/python3/cmk/base/cee/bakery/agent_bakery.py”, line 1680, in bake_on_restart
_do_bake_agents()
File “/omd/sites/kaikaito/lib/python3/cmk/base/cee/bakery/agent_bakery.py”, line 1718, in _do_bake_agents
AgentBakery(
File “/omd/sites/kaikaito/lib/python3/cmk/base/cee/bakery/agent_bakery.py”, line 1266, in init
agent_bakery_plugins.load_pre_17_bakelets()
File “/omd/sites/kaikaito/lib/python3/cmk/base/cee/bakery/plugins.py”, line 108, in load_pre_17_bakelets
exec(open(path + “/” + entry).read(), globals(), globals()) # yapf: disable
File “”, line 10
os.chmod(target_dir + “/apt”, 0755)
^
SyntaxError: leading zeros in decimal integer literals are not permitted; use an 0o prefix for octal integers