when I load a save, I get this error -

Unable to find Target Clone 'scamp_summon00000003' in Load for REFR 'slaughterfish000000EA'.

If I skip past it, it seems to load as normal, and when I resave I don't get the error. Looking at Wrye Mash, everything seems to be in order.
I just would hate to carry on, only to have it start CTDing all the time - any insights would be highly appreicated.

So, keep a backup of the previous save to be 100% relaxed, but error should be gone for good. I think this is something not so uncommon with summoned creatures, if summon time is out (and summoned creature is deleted) just when a enemy is targeting it, so the engine should be able to cope with it