Hi @MikSalganekCan you please login to Zoom web portal > account management > account settings > toggle off the option Always display "Zoom Meeting" as the meeting topic. Once done; try signing out, refreshing, and re-creating a meeting to see if you're able to change the Meeting Topic name.
Secondly, if there is more than one occurrence -- try to edit it and choose ALL instead of choosing only this meeting, and you should be able to edit the topic.