Flaky test monkey_business: undefined variable /mob/living/basic/cockroach/var/chronological_age

[github-actions]

Flaky tests were detected in this test run. This means that there was a failure that was cleared when the tests were simply restarted.
Failures:

monkey_business: [17:16:45] Runtime in modular_darkpack/modules/merits_flaws/code/negative_quirks/derangement.dm,167: undefined variable /mob/living/basic/cockroach/var/chronological_age
proc name: start (/datum/hallucination/your_mother/malk/start)
src: /datum/hallucination/your_moth... (/datum/hallucination/your_mother/malk)
call stack:
/datum/hallucination/your_moth... (/datum/hallucination/your_mother/malk): start()
the cockroach (/mob/living/basic/cockroach):  cause hallucination(/list (/list))
/datum/status_effect/hallucina... (/datum/status_effect/hallucination): tick(2)
/datum/status_effect/hallucina... (/datum/status_effect/hallucination): process(1)
Processing (/datum/controller/subsystem/processing): fire(0)
Processing (/datum/controller/subsystem/processing): ignite(0)
Master (/datum/controller/master): RunQueue()
Master (/datum/controller/master): Loop(4)
Master (/datum/controller/master): StartProcessing(0) at modular_darkpack/modules/merits_flaws/code/negative_quirks/derangement.dm:167