When attempting to move or edit a layout item, the item does not appear in the layout item drop down menu to be selected and it is noted that the layout item has the same prefix as another item, for example Text-1.
The solution to this I to delete item you are trying to edit, then delete the other item with the same prefix, and then add back the one you were trying to edit in the first, then finally add back the 2nd item that was deleted. Now they will both have different prefix names and the original item can now be edited.
Each layout item should have its own prefix like Text-1, Field-1 for example. Basically, this issue occurs if two layout items have the same prefix so you have to delete both items that have the same prefixes and then re-add them sequentially so that they each are assigned their own unique prefix: