Sometimes the user promote elsewhere and after a decade the only guy or ladies know what is going on is the IT lot. Have to advise them what to do, what not to

Sometimes the user promote elsewhere and after a decade the only guy or ladies know what is going on is the IT lot. Have to advise them what to do, what not to and what is possible. They Ss try their new thing. Just break the system. The only way out is to redo the whole system sometimes. It is not ease.