The product may have a duplicate in the 'External Stock' location. To solve this error, please follow the below steps.
1. From 'Dashboard', go to [Inventory] [Settings] [External Locations].
2. Type the name of the Supplier in the 'Search for External Locations' field and [search]. Click on the Supplier's Name shown in 'blue' to view Stock Levels.
3. Type the name of the product in the 'Search for Stock Levels' field and click [search], to see if there is a duplicate product.
4. If there is a duplicate found, complete the Merge Duplicate Items in Inventory (Stock Adjustment) process to correct the duplication and Stock Levels.
If the error message still displays, please contact Marketboomer Customer Service via Live Chat or email [email protected], and we will be very happy to assist further.