"Duplicate Relationship" error

[christianwach]

Steps to reproduce:

• Create a Relationship
• Remove the Relationship
• Try and reinstate the same Relationship

I get "Network Error. Unable to reach the server. Please refresh this page in your browser and try again." I traced this back to an invalid JSON response - it's actually a CiviCRM error page that says that I'm trying to create a "Duplicate Relationship".

I presume this is because the Relationship does exist, it's just is_active = 0.

[colemanw]

This may be an error that reproduces in a typical testing scenario but not in a typical real-world situation. IIRC the "duplicate" error only comes up if the original and new relationships have the same start date. That's pretty rare for real-world use, but common if you're quickly testing out the site by creating and deleting relationships in quick succession.