This is a strange one and please forgive the long explanation!

I have a couple of document types:

• guides repository (no properties and can have children of type 'guide')
• guide (title, description etc)

I then create this content at the root level (I have also created this under the 'home' page to try and resolve the issue)

I have a composition that contains a tree picker that allows a user to select from the guides repository.

This all worked very well until I restarted the app. The guides repo and guides were completely missing. I tried to re-add them and got the following error:

failed to get last child with id=-1

If I rebuild the indexes I can re-add the guides repo and guides, but another restart causes them to disappear again!

I am running v8.9.1 and this occurs on both Azure and non-Azure environments.

I have tried the following:

• delete anything related to guide and guides repo and re-add (document types, composition and content)
• rebuilt indexes and nucache db
• tried to rename the types (id's not just the name)
• created the content at the root level and also under the 'home' page

It looks like something has been corrupted but I don't really know where to look.

Any ideas would be greatly appreciated!

Thanks,

Ben