Lost License after upgrade from 4 to 10

After upgrading from Cubase 4 to Cubase 10, the license for C4 has disappeared from my e-licenser, so I cannot run it anymore… is this a normal thing ? it worked for a year, then it’s gone…

I now realized that I upgraded Cubase Essential 4 to Cubase Essential 10, so it’s probably the same license, that’s why it “disappeared” from the dongle. However, now I can’t run Cubase Essential 4 anymore, and that is a problem because Cubase 10 is ultra-heavy and clunky by just opening ONE VSTi

And what is the exact error message you get when trying to run Essential 4?

eLicenser(s) contain(s) no valid license for this application .

MAYBE, I’m not sure, but I might have messed up the license when trying to install a OEM version of CUBASE LE that came with my M-AUDIO 2X2M … the idea of CUBASE without a dongle was very appealing… but it refused to install itself