[SOLVED] OpenVPN Server: Cannot open TUN/TAP dev /dev/tun2: Device busy

[BeNe]

Hello!

i upgraded very successful to 20.1 - thanks for that.
All Services excluded OpenVPN-Server are running fine. The OpenVPN Server stopped and i´m unable to start it.
It worked fine before in 19.x

Here is the Log:

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2020-02-01T20:31:42 openvpn[33750]: Exiting due to fatal error
2020-02-01T20:31:42 openvpn[33750]: Cannot open TUN/TAP dev /dev/tun2: Device busy (errno=16)
2020-02-01T20:31:42 openvpn[33750]: TUN/TAP device ovpns2 exists previously, keep at program end
2020-02-01T20:31:42 openvpn[33750]: NOTE: the current --script-security setting may allow this configuration to call user-defined scripts
2020-02-01T20:31:42 openvpn[33750]: WARNING: using --duplicate-cn and --client-config-dir together is probably not what you want
2020-02-01T20:31:42 openvpn[31339]: library versions: LibreSSL 3.0.2, LZO 2.10
2020-02-01T20:31:42 openvpn[31339]: OpenVPN 2.4.8 amd64-portbld-freebsd11.2 [SSL (OpenSSL)] [LZO] [LZ4] [MH/RECVDA] [AEAD] built on Jan 29 2020

Here are the current devices:

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:/dev # ls -lha | grep tun
crw-------   1 uucp  dialer     0x76 Jan 31 20:57 tun0
crw-------   1 uucp  dialer     0x62 Feb  1 20:45 tun1
crw-------   1 uucp  dialer     0x63 Jan 31 20:57 tun2
crw-------   1 uucp  dialer     0x65 Jan 31 20:57 tun3
crw-------   1 uucp  dialer     0x67 Jan 31 20:57 tun4

Is there anything else i can test or provide to debug ?
Thank you!

[BeNe]

Reboot of the machine fixed the problem!