/root/.acme.sh/cwp_certs/
As an example, you would delete the offending domain:
rm -rf /root/.acme.sh/cwp_certs/www.domain.com
Which removes the domain configuration, certificates and keys -- so make SURE you want to do this:
[root@srv]# ls -al /root/.acme.sh/cwp_certs/www.domain.com
total 40
drwxr-xr-x. 3 root root 211 Apr 1 2021 .
drwxr-xr-x. 89 root root 4096 Jun 21 22:22 ..
drwxr-xr-x. 2 root root 58 Apr 1 2021 backup
-rw-r--r--. 1 root root 3751 May 23 00:42 ca.cer
-rw-r--r--. 1 root root 5682 May 23 00:42 fullchain.cer
-rw-r--r--. 1 root root 1931 May 23 00:42
www.domain.com.cer-rw-r--r--. 1 root root 918 May 23 00:42
www.domain.com.conf-rw-r--r--. 1 root root 1094 May 23 00:42
www.domain.com.csr-rw-r--r--. 1 root root 259 May 23 00:42
www.domain.com.csr.conf-rw-r--r--. 1 root root 1679 Apr 1 2021
www.domain.com.key]