We have Thunderbird in our office. Where there about 5 or 6 computers with the same accounts using Thunderbird perfectly. But after one computer had to be took home for the homeworking during the lockdow. We all had the same tags so we could classify much better the work for everyone. But after the first days this one computer lost all the tags, so from this computer you can not see any of the tags that we put with the other computers. And from other computers we can't either see the tags that we put from this computer. So we can barely work with this computer. We have checked everything, delete all of them and add them again, we have chacked all the data from both computers is the same, also one our colleague knows a bit more of computers, but he could not find anything either. We have checked for information in articles and other question but we couldn't find anyone with our same case. Could you help us?