Vue - error compiling template?

Question

Vue.js

Good afternoon.
Not so long ago I asked this question:
Vue is a form builder. Defeat overwriting value in inputs?
Evgeniy S advised v-model so that the changed values ​​of the inputs after each action are not overwritten.
Now, in the example, everything works as it should, only I am confused by the fact that the console swears at a conflict.
I apparently missed something fundamental while reading the doc, but what vue wants from me in this case, I don’t really understand, until I have enough experience

Mistake

[Vue warn]: Error compiling template:
:value="itemchar[0]" conflicts with v-model on the same element because the latter already expands to a value binding internally

Answer 1

:value is redundant.
in fact v-model is a wrapper over :value and @change
:value must be removed