How to remove a watchtower

OK then I will retry after SW updates/reboot maybe it will help.

I think you need to add a new one before removing the old one. I think this is an existing LND bug. But it's been around for quite some time. I thought it's already been fixed honestly.

second one was already up, so does not help. then my next question would be does it harm to have the old and new one?

It doesn’t harm. But it would be best to remove. Don’t give up. 

Hello, I'm a non-technical noob trying to get a watch tower set up for my lightning node, but having issues getting a watchtower client set up. When I use the command "$ lncli wtclient towers" I see that the active session candidate is false and number of sessions is 0.  I want to remove all the watchtowers and retrying from a clean set up, but I am unable to remove the watchtowers. Any help would be appreciated!

admin@myNode:~ $ lncli wtclient towers
{
    "towers": [
        {
            "pubkey": "02af24d7295ebd2c48ec8ad05236c602ca4712793b3dc4418decb802d41b5ce450",
            "addresses": [
                "6kvvj7srf2lrbqmscfn4acncecfnuyz62dghs25rdu4b3sighdvgn6id.onion:9911"
            ],
            "active_session_candidate": false,
            "num_sessions": 0,
            "sessions": [
            ]
        } 

admin@myNode:~ $ for i in $(lncli wtclient towers | grep false -B 4 | grep pubkey | awk '{print $2}' | cut -d'"' -f2); do lncli wtclient remove $i; done
[lncli] rpc error: code = Unknown desc = removing towers is disallowed while a new session negotiation is in progress

As far as I know there is a bug in LND. You have to add a watchtower so you can remove another one.

I'm unable to get any watch tower to connect... 
admin@myNode:~ $ lncli wtclient towers
{
    "towers": [
        {
            "pubkey": "02af24d7295ebd2c48ec8ad05236c602ca4712793b3dc4418decb802d41b5ce450",
            "addresses": [
                "6kvvj7srf2lrbqmscfn4acncecfnuyz62dghs25rdu4b3sighdvgn6id.onion:9911"
            ],
            "active_session_candidate": false,
            "num_sessions": 0,
            "sessions": [
            ]
        },
        {
            "pubkey": "029913ab77909b8e322e72a2d2725348d527c391e6f3a3376411ff562d4bf34c45",
            "addresses": [
                "eft6b5ulv4zh2qi3crd7fyxb3x7xa374ohkmhcx75i73s3hrfoj37tqd.onion:9735"
            ],
            "active_session_candidate": false,
            "num_sessions": 0,
            "sessions": [
            ]
        },
        {
            "pubkey": "025d21fc580d854052e7087670ac85283dd10db7b273fc697827520a34360279db",
            "addresses": [
                "looplnk2vszfniwkiqi66pq5tpkuslzobpo3x6jkpgjzm4jbq7i6f5qd.onion:9911"
            ],
            "active_session_candidate": false,
            "num_sessions": 0,
            "sessions": [
            ]
        },
        {
            "pubkey": "037b41f25c467d7d45a1242cb3926ba049cb2624ef0e3a47437f8f977bae2fca8c",
            "addresses": [
                "wxlxqbdxky755yegdver4xpad44ko6h2hbiun6jjtwhkydgxsewbqfid.onion:9911"
            ],
            "active_session_candidate": false,
            "num_sessions": 0,
            "sessions": [
            ]
        },
        {
            "pubkey": "023bad37e5795654cecc69b43599da8bd5789ac633c098253f60494bde602b60bf",
            "addresses": [
                "iiu4epqzm6cydqhezueenccjlyzrqeruntlzbx47mlmdgfwgtrll66qd.onion:9911"
            ],
            "active_session_candidate": false,
            "num_sessions": 0,
            "sessions": [
            ]
        },
        {
            "pubkey": "03644c350ce2bff6334ef513b2797619fb1c16edecd8011213b26168f522758d28",
            "addresses": [
                "aroxsistvam7yokwok66ptq3wiitov3ktxhhu4txsvh44l3hc4e4rpid.onion:9911"
            ],
            "active_session_candidate": false,
            "num_sessions": 0,
            "sessions": [
            ]
        },
        {
            "pubkey": "0274a6c5e936451bfd66da421941fe933edc95de94b36aec2f7b07ad9055fbe9e6",
            "addresses": [
                "jtnyj5eqenu4427zzooibhx37vblmb5basurl5uod7jn5sbmbzq6isqd.onion:9911"
            ],
            "active_session_candidate": false,
            "num_sessions": 0,
            "sessions": [
            ]
        }
    ]
}