fix: do not initialize FKs to null #34067

Job	Run time
setup	5m 14s
integration-tests-packages	12m 43s
Shard (0) Unit Tests	8m 51s
Shard (1) Unit Tests	5m 4s
Shard (0) Module Integration Tests	11m 10s
Shard (0) HTTP Integration Tests	12m 26s
Shard (1) Module Integration Tests	9m 26s
Shard (1) HTTP Integration Tests	8m 49s
unit-tests	1s
integration-tests-modules	1s
integration-tests-http	1s
	1h 13m 46s

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