Thought that we completed our customer development

We probably spent too much time on a customer development but really enjoyed this process as we were mentored by a very strong cusdev guru. At that point we started getting some serious interest on the back of some previous interviews/chats so we thought we settled on our target audience. This was a false start as we quickly learned the hard way... We started building our first MVP but had to put a break and carry looking for narrowly defined customer persona.