Can't create a certificate (eventually because of an existing one)

Hey Guys

My domain is: / ( /

I createt a Certificate on my Synology ds215j and later accidentally one for the same domain on my new Synology ds1517+ whidout deleting the first one.
Then they didn’t work anymore…
Now I deletet all Certificates and tryed to make a new one but that didn’t work(I created but I didn’t get a secure SSL connection).

My web server is Apache 2.4 PHP 7.0
The operating system my web server runs on is DSM 6.1.3 (linux based).
My hosting provider is

I can login to a root shell on my machine but I can add a Certificate in the DSM much easyer.
There you see how I can install a certificate (1:35 - 2:20)

Thx for help

Creating a second duplicate certificate will not invalidate any existing certificates. Something else changed. What command are you using to obtain these certificates?

I use no commands
I created them like in the Video

Now It’s fixed.
I removed all other certificates.

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