Serial key not work

hi.i have updated LB to newer version and LB say that “activation limit is reached”. what to do now? why after 2-3 update i get this message?

do i make a mistake?

LightBurn provides for 2 seats in the standard license. The “activation limit is reached” message is identifying you are trying to apply your Key after the 2 seats have already been assigned. This can happen if you replaced your hardware without de-activating your license first.

Please send your Key, along with the machine name to support at lightburnsoftware dot com and we can help sort from our end.