External id shouldn't be empty

Why it happens…

No value has been entered in the Basic Information > EEO External ID field.

To resolve:

1. Enter the following value in the Basic Information > EEO External ID field:

   The journal identifier in the EEO, for example ScholarOne. This value can be, but is not necessarily, the same as the journal code in Author Portal. For example, in the case of ScholarOne, if the URL of the corresponding ScholarOne website is https://mc.manuscriptcentral.com/egp, then enter egp in this field.

2. Click Save changes.