@fella5 everything that @DarrenOC and @rwiesmann have said is good advice, but how to proceed really depends on what is currently licensed. This document, https://documentation.meraki.com/General_Administration/Licensing/Meraki_Licensing_-_License_More_De... provides a good description of what happens if you apply a license as a renewal - it essentially resets all your licensed devices to match what’s in that license.
So, if you currently have the MX64 and two MS220 licensed then you could apply the new MS220 licenses as a renewal (thus resetting the licensing to just the MS220 switches), then you can add the MX68W license, and then the new MR46 license - so your licensing should finally end up with two MS220, a MX68W and a MR46 (you’ll need to remove the MX64 from all networks to prevent licensing errors).
However, if you’ve already added the MX68W license you’re a little stuck, you might have to see if support can help you out in anyway, or move across to Per Device Licensing as @DarrenOC suggested.