It works again!!
I set it back to the old address and login works now on the 7o9 account.
@hanswf The Star.Trek account is linked to another phone that has another Jolla account, therefore the second forum account. Normally I always use the 7o9 account to read and write. Can I delete the Star.Trek account on the forum without also deleting the Jolla account for the phone?
Thank you!