ASM Policy Clone

When you clone  policy, it creates a new policy with the same rule set and
config. as the original policy, but it does not include any learned data.
so any learned data from the original policy, such as HTTP header
length max, will not be carried over to the new policy.

To use the learned data from the old ASM policy in the new VS, you have to 
export the learned data from the old policy and import it into the new policy.