Setting sequential cut off policy/threshold returns 0 status even for non existing cores/caches

[KamilLepek]

For example for the following cache configuration:

type    id   disk             status    write policy   device
cache   1    /dev/nvme0n1p1   Running   wt             -

the following commands return exit code 0

casadm -X -n seq-cutoff -i 1 -j 50 -t 28

casadm -X -n seq-cutoff -i 1 -j 50 -p full

casadm -X -n seq-cutoff -i 5555 -j 50 -p full

casadm -X -n seq-cutoff -i 5555 -p full

When I add core this error still occurs (for different core ids than the one I added). As stated this behaviour occurs when setting per cache or per core.