...
select id, job_name, done from system_job
Click Execute
Check the results for any jobs where done is either False or '0' (depending on what version of DualShield you are using.
Make a note of the ID number next to the job that is False or '0'
In the text field at the top please run the following command
Update system_job SET done=1 WHERE id=n
(n = the corresponding id to the unfinished job, therefore in this example as per the screenshot above, n = 2)
If successful you should now be able to replace the Web Certificate