Cannot see Relations columns under Data tab on Glide

[Jeff_Hager]

Have you made any recent changes to the sheet that would have broken the relation? This could maybe have caused it to go away.

WARNING: Don’t restore your google sheets to earlier time

I restored my google sheets to an earlier time and it complete wiped some key elements of my app. Relations, Look Up Values etc and as well as calculated columns etc…Hours/Days effort ALL GONE - argh