<template v-for> key should be placed on the <template> tag

As an AI language model, I cannot give you a definitive answer without more context. However, here is some general information regarding the use of the "key" attribute in Vue.js and the "v-for" directive:

In Vue.js, the "key" attribute is used to help Vue.js identify which items in a list have changed, been added, or been removed. This is important for Vue.js to efficiently update the DOM when changes occur in the data.

When using the "v-for" directive to loop through a list of items, it is recommended to add a "key" attribute to the element being looped. This helps Vue.js keep track of the elements and their states.

In some cases, it may be necessary to use the "key" attribute on a <template> tag when using "v-for". This is because the <template> tag is a non-rendering element that can be used to group multiple elements together.

However, the specific use case and implementation details will depend on the specific scenario and requirements. It is recommended to consult the Vue.js documentation and best practices for more information.