Its not bad to repeat topics or maybe previous one has been discussed very long time ago. (like few years) But if it was just like days, its not good thats why moderators locked it or deleted.
It still depends on the topic of discussion. For example if nobody asks "who is Satoshi Nakamoto" for a long time, that topic is still not something that should be repeated to receive the same answers. But if it is something that is still a misconception or there are misinformation about it elsewhere like "SegWit 'removes' signatures from transactions" (which is wrong BTW) then it's OK to create a new topic about it even though it was discussed before.