Institutional memory helps prevent people from making the same mistakes year after year. But, by making change more difficult, you'll likely have suboptimal outcomes. So, it's a balancing act. Organizations need to continually evolve, but they need to remember that change isn't a good in and of itself; it's a means to an end.
If you're a new leader, it's important keep an open mind to the fact that the best course of action may be to continue the work of your predecessors and that change may not be necessary. While it's tempting to leave your mark on an organization, often there's a good reason why things have been done a certain way. But, if after careful consideration you still intend to change how things are done, be sure to understand the system, so you're aware of probable side effects.