for example 1.1. visa non b and your first work permit same date. in july you change profession/business and get new wp wdated 1.7. so when you have to apply for new visa the new permit wont be valid 8+ months. so you have to renew otherwise you lose visa.
exactly that's the problem. thanks for your input. isnt there a possibility to renew earlier? i mean its not possible to stay synced all the time. for example changing company, getting new wp with date inbetween the year