Are you recovering -S ssid or -S ssid/cloneid which points to cloneid by cloned ssid?

I'm not sure if message you get is related to capital i or small L (can't see it, I'm getting old), but none of it makes sense for standard recover command as pool is controlled via -b (and -I is for input file).

Let's go to backup for a moment - what kind of backups is this?  Can you post mminfo -S -q ssid= for this save set?