Checklist

• Appropriate branch selected (all PRs must first be merged to dev before they can be merged to master)
• Any modified or new methods or classes have helpful JavaDoc and code is thoroughly commented
• [na] The description lists all applicable issues this PR seeks to resolve
• [na] The description lists any configuration setting(s) that differ from the default settings
• All tests and CI builds passing
• The description lists all relevant PRs included in this release (remove this if not merging to master)
• [na] Code coverage does not significantly worsen (ideally it improves) (remove this if not merging to master)

Description

This PR contains a fix for foreign reference checks:

• Fix ref integrity for foreign refs #331