sed command with /

I am trying to use the sed command like this Code: sed -i 's/cd /usr/bin/prp/prpclient-1/#cd /usr/bin/prp/prpclient-1/g' /home/dingo/myscript.sh" to change cd /usr/bin/prp/prpclient-1 to #cd /usr/bin/prp/prpclient-1

I get this error

Quote:

sed: -e expression #1, char 11: unknown option to `s'

I am not sure if it is the # or the / that is the problem. I am not a programmer and at 71 can't think as well as I used to.

I also want to use the command with pssh to change the file in multiple machines Code: parallel-ssh -h hosts_file.txt -i "sed -i 's/cd /usr/bin/prp/prpclient-1/#cd /usr/bin/prp/prpclient-1/g' /home/dingo/myscript.sh" but I also get an error.
Quote:

Exited with error code 1 Stderr: sed: -e expression #1, char 11: unknown option to `s'

Which us probably the same error.

Any help is always appreciated.