watchdogをデーモン化できない

Question

centOSでデーモン化がうまくいきません。
watchDog.pyファイル常時実行されるように、デーモン化しようとしており、
watchDog.py自体は単体で正常にプログラムが実行されます。
/etc/systemd/systemにwatchDog.serviceという名前でデーモンファイルを作成後、
このコマンドを実行すると以下のように表示されます。

systemctl status watchDog.service -l

● watchDog.service - SFTP Sync Daemon
   Loaded: loaded (/etc/systemd/system/watchDog.service; enabled; vendor preset: disabled)
   Active: failed (Result: start-limit) since 土 2020-02-22 19:02:43 JST; 5min ago
  Process: 2218 ExecStart=/usr/local/pyenv/shims/python /var/www/cgi-bin/watchDogs/watchDog.py (code=exited, status=217/USER)
 Main PID: 2218 (code=exited, status=217/USER)

 2月 22 19:02:43 118-27-15-148 systemd[1]: watchDog.service: main process exited, code=exited, status=217/USER
 2月 22 19:02:43 118-27-15-148 systemd[1]: Failed to start SFTP Sync Daemon.
 2月 22 19:02:43 118-27-15-148 systemd[1]: Unit watchDog.service entered failed state.
 2月 22 19:02:43 118-27-15-148 systemd[1]: watchDog.service failed.
 2月 22 19:02:43 118-27-15-148 systemd[1]: watchDog.service holdoff time over, scheduling restart.
 2月 22 19:02:43 118-27-15-148 systemd[1]: Stopped SFTP Sync Daemon.
 2月 22 19:02:43 118-27-15-148 systemd[1]: start request repeated too quickly for watchDog.service
 2月 22 19:02:43 118-27-15-148 systemd[1]: Failed to start SFTP Sync Daemon.
 2月 22 19:02:43 118-27-15-148 systemd[1]: Unit watchDog.service entered failed state.
 2月 22 19:02:43 118-27-15-148 systemd[1]: watchDog.service failed.

#watchDog.service

[Unit]
Description=SFTP Sync Daemon

[Service]
User=istamp
ExecStart=/usr/local/pyenv/shims/python /var/www/cgi-bin/watchDogs/watchDog.py
Restart=always
Type=notify
WatchdogSec=1

[Install]
WantedBy=multi-user.target

journalctl -xe コマンド実行

--
-- The result is failed.
 2月 22 19:20:32 118-27-15-148 systemd[1]: Unit watchDog.service entered failed state.
 2月 22 19:20:32 118-27-15-148 systemd[1]: watchDog.service failed.
 2月 22 19:20:32 118-27-15-148 systemd[1]: watchDog.service holdoff time over, scheduling restart.
 2月 22 19:20:32 118-27-15-148 systemd[1]: Stopped SFTP Sync Daemon.
-- Subject: Unit watchDog.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit watchDog.service has finished shutting down.
 2月 22 19:20:32 118-27-15-148 systemd[1]: Starting SFTP Sync Daemon...
-- Subject: Unit watchDog.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit watchDog.service has begun starting up.
 2月 22 19:20:32 118-27-15-148 systemd[2286]: Failed at step USER spawning /usr/local/pyenv/shims/python: No such pr
-- Subject: Process /usr/local/pyenv/shims/python could not be executed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- The process /usr/local/pyenv/shims/python could not be executed and failed.
--
-- The error number returned by this process is 3.
 2月 22 19:20:32 118-27-15-148 systemd[1]: watchDog.service: main process exited, code=exited, status=217/USER
 2月 22 19:20:32 118-27-15-148 systemd[1]: Failed to start SFTP Sync Daemon.
-- Subject: Unit watchDog.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit watchDog.service has failed.
--
-- The result is failed.
 2月 22 19:20:32 118-27-15-148 systemd[1]: Unit watchDog.service entered failed state.
 2月 22 19:20:32 118-27-15-148 systemd[1]: watchDog.service failed.
 2月 22 19:20:33 118-27-15-148 systemd[1]: watchDog.service holdoff time over, scheduling restart.
 2月 22 19:20:33 118-27-15-148 systemd[1]: Stopped SFTP Sync Daemon.
-- Subject: Unit watchDog.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit watchDog.service has finished shutting down.
 2月 22 19:20:33 118-27-15-148 systemd[1]: start request repeated too quickly for watchDog.service
 2月 22 19:20:33 118-27-15-148 systemd[1]: Failed to start SFTP Sync Daemon.
-- Subject: Unit watchDog.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit watchDog.service has failed.
--
-- The result is failed.
 2月 22 19:20:33 118-27-15-148 systemd[1]: Unit watchDog.service entered failed state.
 2月 22 19:20:33 118-27-15-148 systemd[1]: watchDog.service failed.

なにが原因でデーモン化出来ないのでしょうか？

Answer 1

watchDog.serviceの
watchdogSec を削除することでとりあえず起動することが出来ました。
ですが、１回起動すると2回目以降は監視してくれないのかうまく行きませんでした。
ちなみに、systemctl enable watchDog.serviceこちらは実行しております。
こちらは他の質問として質問したいと思います。