This is a little confusing, and I’m unsure if this is something fixable, a bug, or impossible given how sync works.
Basically if you change an Item Type, then all of the relationships for that item are broken, even if the new type should already be able to have that relationship.
So let’s say I have Item Types ‘Men’ and ‘Women’, but I go and decide to gather them all under ‘Character’ instead. I also have Item Type ‘Chapter’ and there is the relationship ‘Related To’ for Men, Women, and Character.
John is currently the type ‘Men’ and has the relationship ‘Related to Chapter 1’
If I make his type ‘Character’ it breaks the relationship ‘Related to Chapter 1’ even if I can then just add it again, because ‘Character’ can also have that relationship. But it won’t do it for me, and I have to manually re-add all of the relationships.
I am hoping I just messed up somewhere and I didn’t just lose a bunch of connected items, but if I did, I hope this is something that can be worked on in the future.