Deploy to Prod github action fails

I get an error when trying to deploy to my vps vis ssh and github actions- This is the log i get back

> Run dep deploy staging --tag= -vvv
> [localhost] > git rev-parse --abbrev-ref HEAD
> [localhost] < HEAD
> ✈︎ Deploying HEAD on staging.projsite.io
> • done on [staging.projsite.io]
> ➤ Executing task deploy:prepare
> [staging.projsite.io] > echo $0
> [staging.projsite.io] < ssh multiplexing initialization
> [staging.projsite.io] < Host key verification failed.
> ➤ Executing task deploy:failed
> • done on [staging.projsite.io]
> ✔ Ok [0ms]
> ➤ Executing task deploy:unlock
> [staging.projsite.io] > rm -f /var/www/dev/.dep/deploy.lock
> [staging.projsite.io] < ssh multiplexing initialization
> [staging.projsite.io] < Host key verification failed.
> 
> In Client.php line 103:
>                                                              
>   [Deployer\Exception\RuntimeException (-1)]                 
>   The command "rm -f /var/www/dev/.dep/deploy.lock" failed.  
>                                                              
>   Exit Code: -1 (Unknown error)                              
>                                                              
>   Host Name: staging.projsite.io                             
>                                                              
>   ================                                           
>   Host key verification failed.

This is my workflow

deploy-staging:

    name: Deploy Project to STAGING Server

    runs-on: ubuntu-16.04

    needs: [build-js-staging, app-tests]

    if: github.ref == 'refs/heads/staging'

    steps:

      - uses: actions/checkout@v1

      - name: Fetch built assets from Artifacts

        uses: actions/download-artifact@v1

        with:

          name: assets

          path: public

      - name: Setup PHP

        uses: shivammathur/setup-php@master

        with:

          php-version: 7.4

          coverage: xdebug

      - name: Composer install

        run: composer install

      - name: Setup Deployer

        uses: atymic/deployer-php-action@master

        with:

          ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}

          ssh-known-hosts: ${{ secrets.SSH_KNOWN_HOSTS }}

      - name: Deploy to Prod

        env:

          DOT_ENV: ${{ secrets.DOT_ENV_STAGING }}

        run: dep deploy staging --tag=${{ env.GITHUB_REF }} -vvv