This page applies to Harlequin v13.1r0 and later; both Harlequin Core and Harlequin MultiRIP.
If you try to activate a product key for an update but you select the wrong protection key in the LDK Tool, the following message appears:
Activation failed (400): Protection Key ID (nnn) either activated or does not belong to this Product Key
This error does not decrement the available activation count; you can try again with the right key with no ill effects.