IC Dimension Error

All - I recently setup IC dimensions and now when I try to accept an IC entry from the inbox I get the following message:

The Journal Line dimension already exists.

Identification fields and values:

TableID=‘81’, Jounral Template Name=‘Intercompa’, Journal

Batch Name=‘Default’, Journal Line No.=‘10000’, Allocation Line

No.=‘0’, Dimension Code=‘Project’

Any thoughts on what is causing this error would be greatly appreciated.