Message "you already have a similar license key for the same product"

The message "you already have a similar license key for the same product" appeared most probably because you have tried to activate Audials a second time with the same license key and same Audials account, but that message can be ignored and you should be able to use Audials further without any limitation.

The same message may appear if you had an Audials license key which you have refunded and afterwards you purchased another license for the same Audials product version. But again, that message can be ignored and you should be able to use Audials further without any limitation.