Resolved Error when adding Domain alias

[eaonflux]

Version Plesk Obsidian v18.0.20_build1800191018.18 os_CentOS 7
CentOS Linux 7.6.1810 (Core)
Web Pro Edition

When i add a new domain alias to one specific domain i get an error;
"can not add mail.project.domain.nl. IN A 111.111.111.111 to zone project.domain.nl: DNS-record al ready exists."

p.s. i translated the error from dutch to english and anonimised the ip and domain.

funny part is this record doesnt exists and it really doesnt matter wich name i come up with i am still getting this error for this specific domain "domain.nl"

if i add a domain alias to another existing domain then it is no problem? The domain alias is added.

domain.nl has already 5 domain aliases, is there a limit in aliases? which would be odd.

i already tried to repair and diagnosic everything and nothing found plus the error still isnt fixed.
cmd i used in ssh is; plesk repair all

i have 14 domains. my license give me 30 with unlimited domain aliases

i have no clue how to fix this?

 

[eaonflux]

ah i tried one last thing; restting dns to default and it is working now. thread can be closed