Why is the error "[vuex] do not mutate vuex store state outside mutation handlers." in the NUXT project?

Question

JavaScript

There is a module in the Store, like this:

export const state = () => ({
  list: []
})

export const mutations = {
  addToListM(state, data) {
    state.list.push(data)
  }
}

export const getters = {
  getList: (state) => {
    return state.list
  }
}

In the component, a method that commits new data from the data component to the module state, after which it resets some data values ​​to its original state:

resultToList() {
      this.$store.dispatch('transportcalc/addToList', {params: this.params, indices: this.indices, result: this.result, description: ''})
      this.result = false
      this.indices = false
      this.volume = ''
      this.power = ''
    }

I get data from the Store via computed and then expand the table based on this data:

computed: {
    list: {
      get() {
        return this.$store.getters['transportcalc/getList']
      },
      set() {

      }
    }
  },

The problem is that after the first set of data in the Store is committed and I start changing the parameters in the Data component (specifically, changing the params), I get the error [vuex] do not mutate vuex store state outside mutation handlers. Where to dig, tell me?