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Use one foreign key reference state #1125

Job	Run time
Grammar Choice Conflicts	28s
Gradle Check (windows-latest)	2m 59s
Gradle Check (ubuntu-latest)	3m 38s
Gradle Check (macos-latest)	4m 23s
Maven Verify (macos-latest)	6m 29s
Maven Verify (windows-latest)	5m 31s
Maven Verify (ubuntu-latest)	3m 54s
Build & Deploy Sphinx Docs	-1s
Gradle Publish (Maven Central)	-1s
	27m 20s