When conducting focus groups it is extremely important to understand that the more data you compile from your research group the better. This will help the analysis at the end. It is not of matter of conducting additional focus groups. The focus should be on the information you receive. Respondents should participate and deliver insightful information.
Additionally, this participation should be with specific answers that as a marketer you can use to answer your research question. Answers that are open-ended and lead to a conversation where the respondent can express themselves freely will result in better data collection analysis and in the end, provide you with an opportunity for the brand to improve.
Overall, data should drive the decision process for your company.