Campaign Monitor synchronization error. Field Key Already Exists

When I unselect all checkboxes and then click “save and sync” it does not give me that error message when I save & sync, but when the checkboxes are checked, the error message appears.

Hi!
I don’t think this is related to the upgrade. Probably some field names can cause the error. My email is pilotessa at gmail dot com. Send me a screen dump with the checkboxes and tell what plugins you use. I will try to help you.

Hi Elena, I’ve sent you an email just now.

Thanks!

Scott O.

I figured out what is causing the :

Campaign Monitor synchronization error.
Field Key Already Exists

I have a custom field in Campaign Monitor that is already set up using the name ‘status’, however, it is a dropdown choice, not a plain text field.

It seems that your plugin doesn’t like when a custom field already exists and is not a plain text field.

It seems there is another reason. Our plugin uses a case-sensitive comparison of field names. Probably you have ‘status’ field in WP and ‘Status’ field in CM.

In fact, I don’t know what to do with it. I can’t create a new field, and I can’t store data using the field name with letters in different case.
Any ideas?