Raised whenever an update is requested while another update is already in progress.
Possible Causes
You cannot change a SIM's status or its Rate Plan while another update is already in progress.
Possible Solutions
Verify that there is not an update already in progress for the SIM. If an update is in progress, the SIM's status will be either scheduled or updating and you will need to wait for it to finish before you can make additional updates to the SIM's status or Rate Plan.