looking for a common phrase that means "solving one problem yet causing another"
Unintended consequence is defined as the unexpected result of taking some positive action to implement change, with one of the following three scenarios:
- The initial problem is solved, while yielding an unanticipated benefit, described as a windfall.
- The initial problem is solved but there is an unanticipated consequence that results in an unforeseen negative event.
- The worst situation is a perverse outcome, when the action doesn't solve the original problem at all, but actually makes it worse instead.
Solving one problem but causing another one is the second scenario. The initial problem does get solved, but a new problem arises as a result. These are some examples of unintended consequences.
Phrases for this situation are "law of unintended consequences", "unintended consequence" or "drawback".