My second hand iMac 2017 retina 5k running OSX Catalina has always had a split fusion drive as seen in image attached and I have been using it like that for ages and backing up via time machine to anexternal drive.

Now I want to reset the fusion drive ( but once I do the fresh Catelina install and try to restore from time machine are there going to be issues? Eg backup is of split fusion drive and now there is a fusion drive. I assume not but wonder if anyone has done this and can help?

Thanks in advance.

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