What does it mean the duplicateItem error when moveIndex != nil?

[iDevid]

Hello,
I recently experienced a crash in an animated datasource due to a duplicateItem error.

The error is given by the by line 218 in Diff.swift, when it check
initialItemData[itemPath.sectionIndex][itemPath.itemIndex].moveIndex != nil

I checked the newSections model but there aren't duplicated items, could you explain when this type of error is given?

Thank You

[teameh]

I think this can also occur if your initialSections contains 2 items or sections with the same key. Would that have been the case?

[iDevid]

Thanks for the reply,
I will check if this is the case, meanwhile, don't you think we should better explain the situation that arises?