Mcreater deleted mod elements and I cant load backup workspaces

I have been working on a mod in regards to chemistry and was able to export modfiles to curseforge. However the last time I signed into resume working I notice much of the elements has been erased. I have a few backup workspaces yet when I try to reload them it and open one of the ore blocks it will tell me the element does not have saved instance, is corrupted or you may need to delete and remake this element. Now this all loaded from one of the backups from Mcreator.The copy that I have installed on my Minecraft game works as intended. How is one supposed to load the backups so that the elements added all work?