The problem you're referring to is known as "Keyed Components Update Issues" in Vue.js, which can occur when using the v-for directive with a dynamic list and changing the key of some or all items while rendering. Here are steps to fix this:

1. Use key attribute correctly: Make sure that each item rendered by v-for has a unique key attribute. The key should be unique across renders, but it's okay if the list items have different IDs or other stable values as long as they don't change in between renders.

<div v-for="(item, index) in items" :key="index">{{ item }}</div>

In this example, index is a good choice for the key because it's stable across all renders but not predictable, which may result in performance issues. Consider using other unique identifiers like id from your data source if available:

<div v-for="(item, index) In items" :key="item.id">{{ item }}</div>

2. Avoid Mutating the Original Array: Ensure that you're not directly modifying the original array (if it comes from an API or is part of a Vuex store). If you need to add, remove, or update items in your array, use methods instead and return a new array based on the current state.

3. Use <transition-group> for Animations: When animating changes in your list with transitions, use the <transition-group> component instead of v-for. This allows Vue to manage animations by comparing the keys of the items before and after rendering.

<transition-group name="list" tag="div">
  <div v-for="(item, index) in items" :key="item.id">{{ item }}</div>
</transition-group>

4. Use :is="" for Dynamic Components: If you're using dynamic components (using the <component> component or shorthand <component :is="ComponentName" />), ensure that your component names are correctly set up and dynamic. Vue may not always update dynamic component when changing keys if they don't match exactly.

<component v-for="(item, index) In items" :key="index" :is="getComponentName(item)"></component>

By following these steps and addressing the issues that arise due to keyed component updates in Vue.js, you should be able to troubleshoot and resolve this issue effectively.